Use 2 to 4 drops of the ammonium chloride - the concentration changed. Adding 1 drop is fine but the right amount is 4 drops per gallon.

Finally someone with clear and direct instructions. All these damn fish forums have people chiming in with little to no experience, confusing the basic process so nobody knows what they are doing. I am SO glad I found this video. I bought a new tank. I removed the filter bag once the temp got up to 78. Then I added tetra safestart bacteria and 15 drops of pure ammonia from Ace hardware. Ammonia test read 2ppm. Now I wait. Very easy instructions to follow and I wish those fish forums were taken down as they only lead to confuse people looking for answers. Thank you!!!

Thanks for the new video Dr. Tim! I've used One & Only to fishless cycle several of my tanks, and also use the Ammonium Chloride drops twice a week (as you instructed in an email) to my quarantine tank when it's empty to keep the cycle going. I've never experienced a bacterial bloom, and have healthy cycled freshwater tanks thanks to you and your products.

Dr. Tim thank God I found this video. I plan to cycle my fish tank with your products. thank u for making it easy for Beginners like me. 🤗

Hello Dr Tim, thank you so much, irs wonderful to Finally find someone to clearly explain what is required to cycle I brand new aquarium. I’ve just ordered a 2 oz bottle of your ammonia chloride to start the process of cycling my new 135 litre aquarium. My new aquarium has new driftwood, rocks and live plants in it with black sand. It’s been running fir 6 days now and been doing water tests every two days, however there is no ammonia in my tank. Once the ammonia chloride arrives I can follow your precise instructions and get my new aquarium cycled, hooray, many many thanks Dr Tim, your a genius

Thanks Dr Tim for the fast reply! I knew I missed something, I always do haha.

Warning: if you dose 4 drops ammonia per gallon without taking into account the space your substrate and rock work takes up in the tank, you will with certainty overdose ammonia past the recommended max of 2ppm. The reality is you do not actually have 20 gallons of water in your 20gal tank (for example), ultimately resulting in stalling your cycle. I believe this is one of the single biggest issues people face when fishless cycling their tanks. The reality is most people will need closer to 2-2.5 drops per gallon of ammonia to reach the required 2ppm dose in the tank when starting your cycle. Be cautious, dose 2 drops per gallon, wait 5 minutes and test your initial ammonia levels. Add more ammonia if needed. Hope this helps some people not make the same mistake I did.

Glad you made this video. There was a lot of confusion on this topic throughout the forums.

Omg this is the easist explanation out of all the cycle videos i have watched thank you so much subbed

What happens if my bacteria was only partially cloudy??

Thank you for such simple instructions, great video!

When I first learned about the nitrogen cycle I didn’t want to get a fish anymore because I thought it was very confusing and it wouldn’t be fair to the fish if I did it wrong so I waited and didn’t get one, after watching this video I realize it’s not that difficult and I’m gonna cycle my tank I’ve had sitting in my room for months, thank you! This is the only video I’ve been able to understand completely

Try put headset or earphones and play this video. There's something going on, it only play one earpiece lol

Mines says 4 drops per gallon

Wish had seen this video before I used Dr. Tim's ammonia because the instructions on the bottle said to use 4 drops per gallon. Next day ammonia test reading was high off the chart. Best to put 1 drop or more in a gallon of water to determin the exact amount needed to reach 2.0 MLS or for the desired ammonia amount looking for. All is good after a 25% water change then added one & only purchased after the ammonia. Dr. Tim's is the best. Thumbs up!

Just did your cycle method. Wanted to provide feedback. It worked. I followed the printable pdf for using the one and only. I have 150 gallons. I used your ammonia and did 4 drops per gallon. I measured ammonia, nitrite, and nitrates everyday. I was at 1.022 salinity at 77.5 degrees on average. My nitrates spiked up to 85. I did a 30% water change. nitrites were deep purple. I checked the next day and nitrates went down from 85 to 50 ish. Nitrites were still high. Ammonia was starting to lighten up. 4 days later nitrates were down to 18, nitrites still deep purple. Ammonia was .25 or almost done. A few days later ammonia was gone, nitrites shifted to lavender, and nitrates were still dropping. Yesterday light blue nitrites, low nitrates, and ammonia is as low as it goes. I love your product. I didn’t have the data in front of me, but I checked the water every day. I the key was when I saw the ammonia start to drop and move closer to zero. Even though I had high Nitrites I was excited because I knew the bacteria was doing it’s thing. What surprised me the most was how the nitrates started dropping on their own. I looked it up, and since nothing is in the tank other than the bacteria, it must of been the movement into gas that made it drop. Thanks again!!! I will recommend your process to everyone. I will also recommend they watch your presentation you did at Macna on the brs website about cycling. I learned so much! Thank you. Please keep teaching us, you have so much to offer.

Hi Dr. Tim, is my tank only cycled if within a 24 hour period my ammonia and nitrite are zero? My ammonia is consistently zero after 24 hours but my nitrite takes about 48 hours to get down to zero. Thanks!

Why in the hell would you leave this video up?!?!?!? If it’s WRONG, take it down! I just started my tank TODAY using the 1 drop per gallon and thought, “great, I’m doing well”, then I read your bottle which states 4 drops per gallon. Hours later and I find out I should have read comments under this video??? Who the hell thinks to read all comments before taking a video at its word, YOUR comments “Dr Tim”! Leaving this video up for newcomers who are genuinely trying to do the right thing is blatantly ignorant and irresponsible! What the hell do I do now?!?!?!?! I am pissed off! TAKE THE VIDEO DOWN! POST A NEW, CORRECTED VIDEO!!!

This video was sooooo helpful for me thank you so much, I'm very new to the fish community and I've been searching constantly for videos on how to cycle and none of them seem to have made sense to me... this however makes clear sense! Thank you!!!

Using this stuff now on my 50 gallon.. uses a bottle of the one and only.. added 200 drops because the new solution is 4 drops her gallon.. now its a waiting game.. i have my fluval aquaclear 110 running and my eheim 150w heater running as well. keep you guys posted.

Thank you so much Dr tim for the response first time I cycle a tank was very easy, great products Dr tim

Thank you!!! Finally information that makes sense and is straight forward!

Works absolutely perfectly. My tank was ready for fish within a week!!!!! Recommended highly!!! All fish did great no problems.

hey dr tim, im going to buy your ammonium chloride stuff online. i found it on amazon! yayyyyy!

I've been doing it wrong this whole time! I've been adding ammonia to try and reach 2 PPM (Online forums are "amazing" by the way) my nitrites are literally above my test kit (Master API Test) levels. Guess who's gonna wait three or four days to see what happens. This guy! Thanks so much!

That's how it's done!! Excellent information

Can say this does work. :) After using the nitrifying bacteria and ammonia my tank was cycled in 10 days. Have a very happy betta swimming away in his 5 gal tank and water levels been perfect. 👌🏼

So pumped! Thank you, sir!

Thank you this is the best one i understand now!

And thats how U explain how its done! Thanx alot!!

Thank you to you and/or your staff for answering my questions on your site the other day. I'm the person with the 55g dirted aquarium with CO2 who mentioned the pH. Currently, my ammonia dropped from 2 to 1 and my nitrite rose from .5 to 5. Furthermore, my nitrates are rising - from 0 to 10. My question is if my ammonia drops to 0 and nitrites drop to 0 or near 0 with a further rise in nitrates should I add more ammonia or consider the cycle finished and water change + fish?

OK sounds good I checked this morning and my ammonium read 0 and nitrite is at 0.25 ppm so I added a dose of 2 ppm ammonium chloride so far so good. Thanks

Hi Dr. Tim... I ordered your one and only, first defense,aquacleanse and ammonium chloride. Today I am on my 14th day of fishless cycle. I've added the full dose of ammonium chloride for the 3rd time. Also Im still in process of almost finishing my research on what fish to purchase. Even tho I've added the recommended dose for the 3rd time is it ok to continue to dose until I receive my fish? If so should it be half dose or full dose? Or should I do the recommended water change and if so then continue to dose? I have a 50 gallon. All Filters are running, heater is at 88 degrees. Ammonia 0.25 ppm, Nitrites drop slowly to 0.50ppm, Nitrates 5.0ppm. Also Thank you for the extras that you sent. You are a top notch business man! Thanks in advance for you reply. Happy Holidays.

ok dr. tim.... thank you for reply..as per post below. tank has now been sitting for about 5d (xmas) with nitrites at 3-5ppm. there are measurable nitrATes conpared with standard. i am have 60gallons of new SW made to do a water change. total system volume ~90 gallons when accounting for LR etc... plan is to do this water change and test again in 24 hrs. hopefully i have naught except some NO3.

Very Informative - Thanks

This is a very helpful video thank you so much.

Once I figured this whole process out, it really is quite simple. I started with spring water and soil. Under two weeks I am completely cycled. *I could have done this sooner perhaps but, it didn’t occur to check the pH. I was around 6.2. I added Alkaline boost and the results started happening fast. Great product if used correctly.

Love this kit! My new tank cycled in only 3 days, but of course I'm continuing the program for the full week. Then I plan to plant it and dose CO2 higher to give them a good start. Maybe a couple weeks later I will do a hefty water change and let everything settle back in before transfering my fish. At first I was so gung ho with this new tank, but there were several hiccups as I built the substrate (designed my own undergravel filter to have hills but also maximize water volume). Then my fish surprisingly spawned in the old tank and it forced me to slow down again... best lesson ever! I'm actually enjoying taking my time to be careful and educate myself as I go. Dr. Tim is a big part of that, and his bacteria/ammonia kit is a fabulous tool!

So do I still need the first defense and the tap water detox? Or just these two?

Hi Dr.Tim , I am currently day 14 into the fishless cycle and i cant seem to get my ammonia and nitrite to drop to zero within 24 hours to finish the cycle. It zeroes out in roughly 30-48 hours. I dose ammonia only when it drops to 0.25-zero ppm of ammonia and nitrite. Do i keep dosing ammonia when the ammonia and nitrite drop to 0.25-zero ppm, until it is consumed in 24 hours?

Hi, I just added the solution this past Saturday, and added 4 drops per gallon as suggested. In all fairness i got my product from Amazon, I'm sure the temperature that is being kept in and transported is way above 80 Degrees, so most likely the bacteria is dead and not working as intended. So after 4 days still at 4PPM of amonia, I will just sit and wait till it goes down, the conversion to Nitrites has not begun neither is at 0. So going to assume product is good but my solution was not kept in the ideal temp... I have a 20 Gallon tank and I added the whole 4 oz bottle.

It worked! Took my 20 gallon tank 3 weeks and 3 days.

can we do this method in a jar with used aquasoil..without a filter?

Hi Dr Tim, Got another question. Started my cycle 6 days ago and been testing ph, nitrite and ammonia. However i've got two test kits for ammonia and one of them is nh3 and the others are nh3+nh4 and there are giving me very different results. Which one should i stick to during the fishless cycle, as I dont want to overdose the ammonium chloride.

Thank you, this helped so much

Hi Dr tim my question is i have a 130L tropical tank, its been up and running now for aprox 7 weeks, i used your dr tims all in one to cycle it, but i keep gettin from the out let exsternal eheim pro 600L filter what looks like piceses of skin floating all over the tank at time, 2 to 3 time a day, my guess is it could be biofilm in the pipes but im not shor, i used new pipes on the set up, and if this will go after time, if this from the all in one ? Advice please, im not over feeding, Thanks for any advice Thanks in advance

So my tank has been up for about 30 days with your product. No my ammonia did recently drop to 0 within the last week, but my nitrites have stayed somewhere around 2pm-5 and have not moved. I eventually did a 18% water change and did add a small six line wrasse to the tank and just add prime each day to detoxify those nitrites. What I’m wondering is, is the bioload in the tank too small with a small Wrasse in a 75 gallon tank that the cycle is just stalled? If so, would it be ok to go ahead and add 3 more smaller fish to the tank and dose more Safe and Easy bacteria while having existing nitrites already in the tank? My thinking is the Safe and Easy will add more bacteria to help with the new fish, and the fish themselves will give the nitrites what’s needed to convert into nitrates.

What is filter socks is that the media in filters iv cycled a small 20L tank but I can’t seem to get my 76L to start it’s been 3 days it’s ammonia is between 4/8 iv added a whole bottle of stability and nothing iv orderd your bacteria would that help should I bring my ammonia down a little with a small water change

Currently cycling a tank, on my 2nd week I read 0 ammonia, around 4ppm nitrite, 50+ nitrates. Should I add ammonia or wait till nitrite drops to 0 as well?

I have a 30 G tank, I used Dr. TIm's All in one 8oz and Ammonium Chloride. Added the whole bottle of all in one, added 30 drops of ammonium chloride in it. After 48 hours, the Ammonia is 2ppm and Nitrite is 2ppm and Nitrate is 10ppm. Should i wait for ammoina/nitrite to go down? i also have a fretZyme turbo 900 live bacteria: it's live and kept in a fridge. Can i Add that into the tank as well so it helps with the ammonia?

What level of ammonia and nitrite does it need to be to add another ammonia? how much do I add the second time? half than original?

H! Should I remove some canister filter media when cycling?

I'm on day 16. Haven't had zeros on the ammonia and nitrite the next day after adding the ammonium chloride. Last time I added ammonium chloride, it took 3 days to get down to zero. I added some two days ago, yesterday I was at 1 ammonia and .5 nitrite. Just keep on? I've added ammonium chloride 3 times so far.

I cycle my tank for 2 months my ammonia and nitrite was really high after i use Dr Tim product after 6 days my tank was fully cycle Dr Tim product is amazing it works if u listen to what he say. happy fish keeping.

My ammonia and nitrite are both at a quarter part per million now. Do you add 4 drops per gallon again once the ammonia hits 0 or is it half the dose- like 2 drops per gallon? I’m worried that adding more ammonia will slow down the process.

is the new ammonia bottle still should be 1 drop or 4 drops(it says 4 in my bottle) per gallon?

I have a juwel rio 180 with inside filter, should i take out all the filtermedia of let iT there? (Sponges, cheramic box etc?

Wish I had known not to continue adding ammonia to bring it back to 2ppm whilst my nitrites and nitrates are sky rocketing I have like 1-2ppm nitrites and 40-80ppm nitrates think I’ll just leave things alone for a few days. Also dose PH drop from co2 injection effect the cycle as my PH is only 6.6 before co2 comes on then drops to around 6 after a couple of hours. Plants are growing insanely fast 4 weeks into planting and cycling, thank goodness it’s fishless.

Hi. Do we just have to use One and Only once at the beginning, correct? tks

OK Dr. I'm on day 11 and my ammonium is at 0 ppm and nitrite is at .25 ppm so I'm going another round of adding ammonium at 2ppm then once this raises and lowers back down to zero can I do a partial water change and add fish. 55 gallon reef tank 20 gallon sump 60lbs dry rock salinity 1.024 pH 8.1

I set my tank yesterday followed everything you say but my amonia reads between 0.50 and 1.0 is this okay or should I start over?

Hello dr Tim I used one and only as you said and it's second day ammonia is 0.25 and no3 is 0 Why ammonia still same as first day why not 0 and should I add more ammonia or wait

I have used the all in one bacteria and also put ammonia in the tank as well 5 days ago and I see lots of ammonia and no nitrites and no nitrates at all. I checked the water every day and it seems like it's the same as the day I started. Is the bacteria working at all or did I get a bad bottle?

Thanks for the video. Shall I remove carbon and zeolite when I do this?

Hi Dr Tim i have cycle my tank for 2 months now but my ammonia is 8 ppm do i need to do a 100 percent water change? or i just add your product in? without doing water change? Thank you dr tim.

Hi, I set up my new tank and let it sit for a day. I have the substrate made from volcanic soil at the bottom as I've already added live plants. After 24hrs from when I set up the tank my ammonia was at 2ppm and I added your One and Only product. The water became a little cloudy for only a few seconds and then it totally cleared up. What does this mean? Also, 24hrs after adding One and Only, my ammonia is between 0.5 and 1.0pmm. Where should I go from here? Thanks!

I have a filter with a filter pad that I believe has carbon in it. Do I need to remover the pad during this process?

Day one before I added anything I had .5 Ammonia. I have live sand. I added the drops and day 2 it’s at 2ppm and .25 nitrite. I know I shouldn’t add more ammonia day 3 unless it drops but how low will the ammonia have To be before I add more?

Would this process change if you had plants in the tank in the initial setup before you started this process?

When you say remover filter socks do you mean also the floss pads inside a canister filter?

Can we check ammonia level after adding ammonium chloride? before adding bacteria. How much minimum ammonia level should be there before adding the bacteria ?

hey Dr Tim, great videos. Im using both the nitrifying bacteria and the ammonium chloride and im on day two and my readings are 0 amm /2.0 nitrite/10ppm nitrate do I just wait another 24hrs to re test to let nitrite and nitrate levels go down then add more ammonium?

Can you add this to a still-cycling tank with fish and shrimp already in it?

Hi what concentration level is the ammonia. i am in Australia and the pure Ammonia is hard to find but i did get one that says 25% concentration. so in my 100 litre tank (26 gal) do i still drop 26 drops...or should it be different based on the ammonia concentration

I added my bacteria Thursday but didn't know about adding ammonium chloride. Can I still add it. Also I didn't remove the filter sock. Should I add more bacteria and ammonium chloride and take the filter sock out ? Please help

on day 5 using dr tim's ammonia and seachem stability. 2ppm ammonia, 0.25 nitrite, 5ppm nitrate, 6.4 ph. I have done a 20-25% wc for the ph level as stated in your recipe card. But do i wait for ammonia and nitrite to go down since i have 5ppm nitrate? or do i dose another 4 drops per gal of ammonia since that and nitrite are not over 5ppm?

so today is 31 I bought a 20 gal tank on the 27 I put 2 mollies one female Betta and a rainbow shark they seem happy but I didn't add any bacteria or let the water cycle or ammonia and bacteria whatever I did put water conditioner it's been four days what should I do should I take the fish out or just do water changes so the ammonia can come out the water

Hi dr tims ,this's my First time Using the one and only with dr tims ammonia ,pour the entire bottle 2oz and 1 drop per gallon ammonia (10 gallons tank) has been cycled for 7 days , ammonia stuck at 2-3, nitrate 0 nitrite 0. What's going wrong? Is the one and only bacteria is all dead or not working?

Should I have my filter running through the cycle? I have an Aqua Clear 30 with the AquaClear Foam, Activated Carbon Filter and BioMax Cycle Guard.

Will my cycle pic back up if I fix the PH in the tank? It has stalled quite a bit

Hi im using salifert test kits ive checked water tonight it now shows nitrate 0.25 and amonia 0.5 still So what is going on any advice ?

I put the one and only in my new marine tank a week ago with his ammonia per instructions. Ammonia levels are still exactly the same as day one and no nitrite to date yet using the api master test kit. Water temp is consistent at 79 and saltwater I bought in jugs so that shouldn't be the problem. Maybe I got a bad bottle, thought something should have happened.

How do set up a small half gallon tank chemically with one small Java plant? This is for a betta and I realize that betta needs a 2 gallon tank at the minimum.

Hi again. So it’s been a week and I’m about 4 straight days with 1pm ammonia and 0.25 nitrites. No movement at all. And my PH is around 8.0 since I put a buffer in it 24 hours ago. I can’t seem to get passed this stalled cycle

just started the process of cycling my 6 FT 125 tank. I used Dr Tim's One and Only and added the ammonium chloride. cranked the heaters up. filters running.........magic

So you put ammonia and the other in the tank at the same time in the beginning?

Should I leave my heater on when I'm doing this? I just started my cycle yesterday and the only thing on is my filter. My heater and lights are off but I'm planning on turning on the lights in the next 2 days.

Yea I made the mistake of having the filter socks in and noticed after about 4 days that ammonia was stuck around 2ppm and 0 on nitrate and nitrite so I went ahead and took the socks out and added a new bottle. I tested today and nitrate and nitrite are up and ammonia is down to .25 ppm. Would you say just wait untill it all zeros out then proceed with fish or would you run another round of ammonia and once that clears then add fish. Thanks for the awesome products.

What size bottle of one and only would I need for a intex mini pool (89 gallons) bare bottom. Will be planting plants in a few weeks, after cycled. For a fishless cycle on fresh tank day one what do I treat the water with. I see you say not prime. I have some instant deCHLOR. If that's better the prime do I continue using that when I do water changes? Or start with deCHLOR wait a day then follow the video establish a cycle and use prime for future water changes/treatment?

How would i fishless cycle a planted aquarium? Would i cycle a bare tank or would i cycle the tank whilst the soil substrate and plants are already in the tank?

Dr Tim, I’m setting up a new tank using a filter & depurator that detoxifies harmful ammonia as it passes through. The filter turns toxic NH3 ammonia into NH4 ammonia which I believe is non toxic. If I use one & only would the bacteria still eat the NH4 ammonia or does it need NH3 present in the tank? Thanks

For clarification, I added the ammonia drops then tested the water 24 hours later and got a reading of 2.0 ppm ammonia, and around day 7 I got readings of nitrites (.25 ppm) My nitrites continued to grow over the course of 2-4 weeks. Around (Day 18-26) I had 1.0 ppm ammonia and 5.0 ppm nitrites, I did an 80% water change and now my readings are .25 ppm ammonia and .50 ppm nitrites, and 20 ppm nitrate (Day 29), Eventually when the ammonia and nitrites levels hit 0, is that when I add the second dosage of ammonia? On the second dosage do I add 4 drops per gallon again or less? Even with the addition of ammonia, ammonia won't strike again correct? The readings will still be 0 ppm even with the second dosage if fully cycled?

I started mine and 24 hours later I do have an ammonia reading. Seems to be between 1 and 2. Zero nitrites. Is my bacteria bad? I ordered it directly from Dr Tim's website and also ordered the climate control pack. I've been keeping it in the fridge like it says to on the bottle.

For the $40 a bottle (120 size) add a "cold mark" indicator to the bottle for about $2.50 so we can tell if it froze during shipping from Dr Tims to the reseller.

Hey Dr Tim..I moved, kept 2 old emperor 400 bio wheels, filter pads and ceramic bio max filter rings in old tank water. 3 months later starting new 135 tank...using old filtration I added Stability only for 7 days..ordered Dr Tim’s ammonia after 7 days. Should I still add it in same dosage.

Can i add another dose of dr tims one and only after 1 week ? Its been 1 week since i set up and my ammonia level hasnt moved at all wondering if i need to add more

I have had high nitrite for ages (few months) with 0 ammonia. Using live sand and one dry rock. I asked for advice from my fish store and was told to do a 50% water change once a week for two weeks (I think to get the nitrites down a little) and add ammonium chloride each change from DrTim’s according to the bottle, it’s week 3 and I’m constantly checking my water, my ammonia has been following the same trend of going up then back to 0 while my nitrite stays at a constant purple (not a very dark one which I got previously)

Hi im sorry im alittle bit confused in the last part and also reading through the comments you recommend to turn off filter for 48 hours after i put the ammonia chloride in but also i see some that say leave everything in filter and keep running. Which should i do?? I have a 10 gallon tank with aqua safe filter

Hello Dr Tim, I’m new to aquariums. My set up consist of Live Sand, Crushed Coral, Live Rock. My tank has been set up since 12/30/21 and today 1/11/22 I’m adding in One and only and ammonia. Since I have all that in tank would I still add 4 drops per gallon or should I test my levels before adding any ammonia?

Um. My ammonia (Biomature Aquarium Ammonia) says to add 2 ml per day to a 60 litre tank (I have 64 litres) so I do. Before I even started I added some "nitryfying bacteria" labelled as stress zyme (I know, I'm stupid). After adding ammonia on the first day I reached around 1.5 ppm of ammonia. After adding on the second day (TODAY) I reached 3 ppm of ammonia. Biomature reccomends getting 5 - 10 ppm of ammonia before you can add bacteria, but tells you to STOP after reaching your goal. I set my goal to 8 ppm. The bacteria that I added at the beggining (I imagine) are feeding on the ammonia and growing and stuff. Once I reach 8 ppm and add more nitrifying bacteria do I just STOP adding ammonia and wait for the level to become 0ppm or do I have to constanly add the same amount of ammonia. The thing is I have to go away in 8 days time, only 9 days of me being able to add ammonia daily. I'm not sure if the technique I am using will "work". In theory when I add more bacteria and they are able to consume all the ammonia and put it back to 0ppm they should be ready to feed on more ammonia (from fish) so If (after I establish my nitrite and nitrate levels to 0ppm and 25ppm or less of course) can't I just add fish and the bacteria will feed on the ammonia produced by the fish. The fish I am planning to add to my 64 litre (16 gallon) are: 4x Panda Cory 1x Betta Fish 2x Nerite Snails Is it possible this is too little fish and that my bacteria will die? I'm not really sure. Also is it safe to do 25% water change for the first two days when the fish are in the tank aswell? Again, I'm not sure and I just want to make sure I get everything right. Also My filter is not in my tank, its a fluval U2 internal filter, because I have to wait a week in order to get a cable to plug in my filter, same with the heater. I will have them setup by 48 hours before my fish are in. Is this enough? Or do I need to start this cycling process after. I would really want to avoid doing that. My temperature right now ( I will correct before adding fish) for cycling is 22 degrees celsius/ 71.6 Farenheight so will my bacteria be able to cycle in this? I'm just curious and don't want my fish to catch the new tank syndrome. If you have the chance please reply. Anybody. Thanks, CookieDodger