HOW IT WORKS: DIY Aquarium Overflow PVC

Рет қаралды 708,720

13 жыл бұрын

Get the ultimate DIY book ► thekingofdiy.com
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Video showing how a pvc overflow works. Also shows cost and gph of each size of PVC. This is a great alternative to drilling your tank, or paying for an expensive hang on the back overflow.
Original video ► goo.gl/4EU9ZX
The modified and upgraded version ► goo.gl/ZGRtXj
Have an issue? cant get it to work? HERE IS THE FIX: I have been answering questions on this project for years now.. and no longer will. Its the same answer again and again... the #1 answer that solves 99% of all issues is this: PAY ATTENTION TO THE VIDEO. 99% simply do not follow the instructions or build it the same way, yet expect it to still work. The other 1% have an air leak somewhere. Find it. Seal it. Sorry, but i simply do not have the time to keep answering the same questions, when they all result with this same solution. IF YOU MUST get help, POST A PHOTO to my fan page so i can at least SEE what the problem is. I will not be able to help otherwise. / uarujoey
Original video ► goo.gl/4EU9ZX
How it all works ► goo.gl/L1Fg7M
The modified and upgraded version ► goo.gl/ZGRtXj

Пікірлер: 403

@QueAquatics 2 жыл бұрын

This may be 10 years old but it’s the best explanation of this kind of overflow! Thanks

@thekingofdiy 8 жыл бұрын

Have an issue? cant get it to work? HERE IS THE FIX: I have been answering questions on this project for years now.. and no longer will. Its the same answer again and again... the #1 answer that solves 99% of all issues is this: PAY ATTENTION TO THE VIDEO. 99% simply do not follow the instructions or build it the same way, yet expect it to still work. The other 1% have an air leak somewhere. Find it. Seal it. Sorry, but i simply do not have the time to keep answering the same questions, when they all result with this same solution. IF YOU MUST get help, POST A PHOTO to my fan page so i can at least SEE what the problem is. I will not be able to help otherwise. facebook.com/UaruJoey Original video ► goo.gl/4EU9ZX How it all works ► goo.gl/L1Fg7M The modified and upgraded version ► goo.gl/ZGRtXj

@michaelyang374 6 жыл бұрын

Cool.

@alb9022 6 жыл бұрын

"Cool" xD

@urbanosilva2094 6 жыл бұрын

HAHAHAHA.... this does not Work...!!!

@ghos282 4 жыл бұрын

THE unanswered question(s): What happens if you adjust the Drain 'T' upwards to the water level in the tank? How does that affect the Flow Rate/Capacity? And Velocity through the Siphon Bend?

@57lvnative 11 жыл бұрын

Just wanted to say Thank You Joey for all the valuable information you've provided. I have been out of fish keeping since the early 1980's but have wanted another tank for a long time. Thanks to all your Video's I now have (in just a couple of months) a 55 gallon Hex Freshwater Artificial Reef aquarium (Gift from a friend, with the D.I.Y. Sump filter and Overflow), a 20 gallon long and the 2 1/2 gallon Bow Front for my Beta "Max". The tanks are amazingly clear and I've learned a lot from you!

@thekingofdiy 10 жыл бұрын

For more videos, pictures and updates: facebook.com/UaruJoey

@rockyrocks6 3 жыл бұрын

Not only do you tell us how to build it, you explain how it works in great detail. You are the man. Thank you so much! A+

@T70MkIII 9 жыл бұрын

Very nice tutorials. I've just build my overflow and when trying to prime it I realized the solution to a problem that has been comment on. If you're sucking on the check valve as shown at 4:00 mins, you will never prime it without capping off the drain and putting some water in the standpipe, so you can suck water up into the loop under the check-valve. Alternatively (after you've capped the drainage) if your stand pipe is long enough it may self-prime just by filling the stand-pipe up above the loop under the check-valve. If that worked, you wouldn't need the check valve. Hope this helps.

@zackmorisco1854 7 жыл бұрын

thanks man. you make this hobby so much more fun! greetings from belgium

@Designlov3n 10 жыл бұрын

Thank you for your awesome videos. I think it's also important to mention the collection of "micro-bubbles" which can collect and eventually break the siphon at the primer point and defeat the entire purpose. I corrected this by running a 1/4" airtube from the primer point to the sump. After priming, air is continually lifted into the 1/4" tube and then back down. This seems to maintain the overflow after a power outage without the worry of air bubbles building up and breaking it overnight.

@joshuadoe9141 9 жыл бұрын

This video answered every single question I didn't even know I was going to need to ask. Great stuff. Very well spoken. Thanksss.

@SmilingDeviant 11 жыл бұрын

BTW - huge compliments on this series of videos.. I've been watching them for several hours today. This was the first one I wanted to comment about, to help improve the presentation.. The rest have been super.

@ev0se7en 10 жыл бұрын

Thanks for the great vid! Ive built myself the 1" version and it works exactly as you said it would. However, i didn't install the check valve. Instead, i simply sucked air through the stand pipe to get it primed.

@Ceretrea 4 жыл бұрын

One of your most useful and most informative videos. Simply explained so even I can build one!

@richardharner9842 5 жыл бұрын

Tried this out today worked like a charm the tricky part was getting it primed love your stuff man keep up the good work

@Ttoeknee01 11 жыл бұрын

You are the man! Thank you so much for the video. Now I'm working on silencing the noisy suction and air bubble, wish me luck. Thanks again.

@drumgawd11 13 жыл бұрын

Thank you so much for this upload! I'm learning something new from every single one of your videos.

@woosoonon1197 8 жыл бұрын

Hi, i watched your clip about 5 times and went out to buy materials to build an overflow and it works beautifully once set up. Instead of the usual white PVC piping and accessories, i used clear PVC piping and parts to reduce the visual impact in the tank and it looks very good, haha.

@Jakel84 12 жыл бұрын

Best info on the subject I've found! I did exactly as you said and it's running (in buckets) great! Can't wait to replace my 2 canister filters on my 125g turtle tank!

@maxneu 12 жыл бұрын

One thing to note. The amount the overflow will handle will vary greatly depending on the elevation difference between the overflow inlet (tank level) and the outlet. placing the outlet near the bottom of the tank will maximize flow. Great vid!

@thekingofdiy 10 жыл бұрын

If you liked this video, you will LOVE my book: thekingofdiy.com

@mef1975 8 жыл бұрын

+The king of DIY QUESTION: 1:55 Can the white pvc portion of the overflow that is outside the yellow line (indicating the aquarium) be inside another aquarium where the water level is only a few inches lower than the first aquarium, will it still function? Or, if that portion is kept between the two aquariums, can the output be raised to where it's only a few inches lower than the input? Or, can it be done with some sort of overflow box? Or will it just never get started again after a power outage? Is a drill-thru into both tanks the only way?

@mef1975 8 жыл бұрын

+The king of DIY Like this or that, would these not work??? i396.photobucket.com/albums/pp43/mef1975/jk_zps2sj44rnj.jpg i396.photobucket.com/albums/pp43/mef1975/jk%201_zpsx0syvcdh.jpg Or maybe, bringing the water level in the taller aquarium down to the same level as the shorter one, and using a U tube or bridge is the only way?

@i3oosted 10 жыл бұрын

Wow, everything is concise and clear, thanks!

@FlintSparkedStudios 10 жыл бұрын

Joey, this is killing me. This design is clearly the best in terms of cost and effectiveness, so I've set my first one up with 3/4" piping, but the darn thing is not moving much water. Certainly not 220 gph. It's barely trickling into the sump, and I had to clamp the return valve because I can't turn my pump down low enough to be less than the overflow amount. Oh well, I'll have to trouble shoot, thanks for the easy how to video on it. You deserve more praise and less questions. haha

@elfpballer6 11 жыл бұрын

I've been looking for a good explanation to this forever and this is absolutely the best. THANK YOU SOOOOO MUCH!!!! liked and subbed!!!

@JohnnyJolt 5 жыл бұрын

Hi there, thank you. I want to use an old aquarium in an aquaponics system with a sump. This was the part I was missing in my system. Thanks again.

@fisherchi 9 жыл бұрын

I've never quite understood the priming part. This great video and explanation cleared that up. Thanks a bunch!

@flowboard04 13 жыл бұрын

Wow I love a lot of your videos. I couldn't find a video of how you made your 284 gallon tank! That would be awesome. I think your tank is easily the most professional looking.

@TheFrugalAudiophile 11 жыл бұрын

Still think this is one of the best DIY overflow how to videos on the web!

@karenvenner8198 3 жыл бұрын

So calm....Where's all the excitement that we've come to expect from the King of DIY?

@thekingofdiy 3 жыл бұрын

This was filmed 10 years+ ago. Scripted Tutorials are not exciting 😂

@weswisehart 9 жыл бұрын

Awesome video. Very informative. Thank you for the wisdom.

@nitratebuster 11 жыл бұрын

Very cool I am going to make one to replace my existing one It looks way better then what I made. Thank you for the instructions and explanation

@FangBlah 12 жыл бұрын

I made an overflow just like this (got the idea from this video, Thank you Joey :) for a 20g tank that I am using as a second refugium on my system. I used 3/4 pvc for the overflow and a little powerhead for the return. I have valves on both so I can adjust , but found that wide open on both is working fine. I did not use the check valve and was able to prime from the hole in the air vent cap. I let it run a few , turned off the powerhead , then back on and it resumed overflow.

@sumalsebastian 7 жыл бұрын

Wow Joey, thanks a lot for the explanation I was waiting for. I dont want to drill a hole on my tank panel and I wasn't able to figure out how this works. For me at my place, drilling the panel after installing tank would be difficult.

@anthillpestcontrol9985 7 жыл бұрын

I'm using this system from this vid my tank been running for 6 weeks thanks for the video very good information from this guy

@selectorenuff 12 жыл бұрын

this is great work keep us informed

@AnthrozoologyTV 11 жыл бұрын

Thanks for the informative video. I made this using 1 1/2" PVC and its great. However I only made one and I'm worried that it may get clogged and my tabk will run over so I need to make that other one asap. But I love overflows simply because you get a height rate of water filtration and it skims the surface of the water at the same time.

@anandbabu7137 4 жыл бұрын

Good Explanation..thanks a lot man..

@jaubrasil 11 жыл бұрын

muito bom está invenção já ia furar meu tanque agora não mais . parabéns !

@DrDangerPuppy 8 жыл бұрын

Best explanation ever.

@IcarusX72 8 жыл бұрын

Excellent video!!!!!

@fourknotsnowhere Жыл бұрын

This is the one that started it all for me!

@Matt-st1tt 6 жыл бұрын

Thankyou so much for explaining this

@fuelban 12 жыл бұрын

well explained video, thanks. Thom in Scotland.

@TheBABIEb97 3 жыл бұрын

Wow how far the quality of your videos and they way they are delivered have changed lot less scripted never a less still fanatic footage 👍

@djacob8546 11 жыл бұрын

this is very helpful man.. thanks.. i already made my own overflow.. now my question is.. what type of pump should i used for my 15gal tank? thanks in advance!

@djknauss1 11 жыл бұрын

nice explanation...

@maximito2007 11 жыл бұрын

Thanks for the first great explanation !!!!!!!

@jimandcherie5821 9 жыл бұрын

Thank you this would be great if I set up a sump on my new tank. I was told that I would have to drill the glass but now I don't. Awesome

@telugutechtalkwithsuresh1729 4 жыл бұрын

Hjj

@MsCashm 12 жыл бұрын

Thanks for the presentation. I created an overflow just exactly as you mentioned only difference is, I use a small suction pump to suck out the air instead of the check valve. I don't know where to get a small check valve, I don't want to keep using the pump, it needs to run all the time and it's noisey. So I prefer your method, if I could find a check valve.

@bhargavreddy4428 7 жыл бұрын

very very helpful...!!! thanks a lot...

@hibox1981 10 жыл бұрын

very nice thank you

@dhfkgir2345 10 жыл бұрын

And by the way your videos are great I subscribed right away and watched a good portion of your videos.thanks again!

@Drogrant 11 жыл бұрын

Amazing video and so informative!!! You did an amazing job at explaining this!! What length of pipe are you using for the example? Very good video!!!

@Jonerod 2 жыл бұрын

Yo I needed this video thank you so much!!!!

@nickjm37fordel1 12 жыл бұрын

I think your videos are the best, very good quality. Can you tell me why the overflow has to go to the bottom of the tank ? I saw one made that only went about half way down, the exit pipe was higher up the tank though. Is it better to go all the way down to the tank bottom ? Thanks, Nick

@MrsSanford08 11 жыл бұрын

Nice video

@frowell9 11 жыл бұрын

Thanks for all the vids Joey, they help a lot. Three questions: (1) Will the overflows get noisier as the diameter increases? (2) As a unitized weir, could I cut or file small teeth around the overflow opening, or drill a ring of small holes just below it? (3) Can I plumb two complete overflow loops together (side by side) and connect them both to only a single tall pipe w/end cap?

@markoppelaar861 10 жыл бұрын

super,... ill definitly try this

@jorgeyanez4789 4 жыл бұрын

Thanks this is great information and a pretty simple solution. Which kind of PVC glue can be used to join the different pipe sections? I am concerned about pvc glue being toxic to fish

@moses6896 10 жыл бұрын

thanks brother...its working

@atchius 10 жыл бұрын

if you have a power outage and the return pump dies, the tank level will drop to just below the open pipe on the inside. if that tall outside standpipe isn't there, gravity to your sump will have a siphon effect-it will continue to pull all the water out of the whole PVC system until it's just a bunch of dry tubes. no problem, right? except when the power comes back and the return pump starts, you have to run over there really quick and slurpy-prime the siphon again before your tank overflows!

@naimbeats 6 жыл бұрын

You are the man.

@louscannonmagoo9989 Жыл бұрын

I ran one of these for years on my old setup. Thinking of making one for my current tank.

@firemonkeykar 8 ай бұрын

Thank you. I keep seeing this type of overflow and could not figure out what keeps the siphon from breaking.

@BODALLY 11 жыл бұрын

Thanks for a Top video pal. I was going to use 1inch pipe for my 180ltr tank also a 1000ltr pump will this work ok??? thanks again top man

@ILTK 11 жыл бұрын

Use powerheads pointed at the bottom to make sure you don't get crap sitting down there, they will blow it up and into the filter. Overflows are useually used with a sump as a biological filter, so just run something like a HOB or canister filter to polish the water at the same time. This also gives you redundancy, if you need to work on your sump or wait for a broken pump your fish will be ok for a while running just on the canister or HOB and the media in them will be cycled.

@T70MkIII 9 жыл бұрын

Ok - I capped off the drain and filled the standpipe, but still had some air in the loop, so the check-valve was needed. Wow - this works really well!!!! I'm using it in conjunction with the DIY Aquarium Auto Water Change at about 2 liters per hour for a 160 liter tank, rather than to a sump and pumping back up to the tank. Will drop this to 1 liter per hour when adjusting, so I get a complete water change every week. Thanks heaps King of DIY - no more manual water changes for me ever again!!!!

@FlintSparkedStudios 11 жыл бұрын

It's an easy way to build your own plumbing for a sump. I'm currently working on one so my filter, heater, and refugium can be underneath the tank out of sight. Plus it increases your overall water volume. I'm doing it for a freshwater planted tank, but it's common for saltwater tanks like coral tanks.

@mannbub 11 жыл бұрын

I really liked the idea and definitely going to use one at my 50 gallon tank, the question I have is why do we need the "Check Valve" as I see is once we suck the air out of this and make it working, we might never need this Valve and for creating the vaccum we can always suck at the longer pipe(Blocking the water outlet). Please confirm if I am thinking it right.

@smokinjojo74 12 жыл бұрын

very nice job on the video, its a great solution to buying one of overflow boxes. i was thinking of building one for my 56 gal fowlr, but i have a couple questions about the return pump for it, lets say i use a 660 gph powerhead for the return, two of the 1 in pipes would be able to keep up with that right? the idea im getting is depending on the amount of water flowing back up into the tank from the sump will dictate the gph of the overflows as long as it doesnt exceed their flow rate.

@FangBlah 12 жыл бұрын

I made the same overflow in this video just like Joey says, but did not use the check valve.I primed the unit by sucking on the air vent cap with the hole in it (yes I did get a mouthful of SW just don"t spit it into your tank :P) . After that I tested the overflow by turning on and off the return pump and the overflow resumed just fine, but I might add a float valve just to be on the safe side. $15 for all I needed in 3/4in along with some extra fittings = no brainer IMO.

@eliballinger4594 10 жыл бұрын

Hopefully this will help some people. First and foremost, yes, this design works (I am using it myself). However, it is not actually an overflow, it's a siphon. Now, this is an extremely clever design and the way it's build allows the siphon to act like an overflow. It being a siphon is the reason so many people may have trouble with this. A siphon relies on suction, so it needs to be airtight. SEAL AND RESEAL. GET IT AIR TIGHT. If air leaks, it will either not work or slowly undo itself.

@BaadMotorFinger 11 жыл бұрын

I was wondering the same question. Like making the overflow pipe shorter and closer to the water level.

@Kragoblin 12 жыл бұрын

thank you

@f4phantomf4 11 жыл бұрын

In the video (the part about flow rates and matching to pump rates) it is mentioned to add two overflows, in case one gets clogged to prevent the tank from overflowing. This isn't mentioned anywhere else, but seems to be an important point. Is the second overflow vital? If not, how do you prevent the tank from overflowing in case of blockage? Thanks....your videos have given me way too many ideas!!!

@World-birder 12 жыл бұрын

great vid, thanks so much, would you tell me where can i get a check valve? and it woks?

@clautamiralves712 11 жыл бұрын

thanks you help me tomuch

@superstarboi 12 жыл бұрын

for a 125 gallon, what diameter pvc would you recommend for the best most efficiente water flow and how many gallons should the pump be able to pump back into the tank? i have been watching your videos for a long time and i think i am finally going to build one of these for my 125 gallon.

@michaelromano5101 11 жыл бұрын

Hey Joey, I am new to the hobby but been using your videos for reviews on upgrading my tank's performance, and sex appeal. What is the purpose of an overflow. Is it to get rid of necessary equipment heater, filter, bubbles, ect from inside your aquarium, and put it into the sump. Can I actually hook my filter inside the sump with the setup. Also am I able to take out all equipment that made current inside the tank with this setup. Please get back to me you are very good at what you do.

@iancharless 11 жыл бұрын

I have watched them both in full.

@papwalker99 11 жыл бұрын

The tee piece is the critical piece, or rather the height of the tee piece above the bottom bends. The 'main' loop going over the tank side is a siphon with a 'head' equal the the height of the tee piece from bottom. Block the outlet and standpipe whilst sucking to get the water over the tank into the main loop.

@CHIEFKCRUE 12 жыл бұрын

great video I built one also. one problem one time it stopped taking in water and I had to once again bleed air from the oneway valve any idea how to correct? I used 1 1/4 pvc worked fine last two weeks but had to restrat siphon last night as it started to overflow

@armagedon751 12 жыл бұрын

hey joey i like ur vids and im making a 3/4 pvc overflow with the pipes to the sump which is then connected by a hose....im using a 290 gallon pump....to the overflow i added a under-gravel cleaner simply by putting a T in the bottom inside part of the overflow....my question is if power goes out the top part will stop the siphon because water will go lower than the entry ...but what about the under-gravel...will it still siphon ? should i drill a small hole on the top of the inside pipe ?

@sayantandas90 11 жыл бұрын

can u ples upload the bottom overflow,and thank u for this video......

@EMRGroup 11 жыл бұрын

Thankyou for this video, I built something a long time ago before check valves were readily available, but this beats that, for something so simple, I feel so stupid for not figuring this out myself lol

@danniman 12 жыл бұрын

so the valve is needed at all times? i thought it was only needed for start up? I was thinking the same thing xreapingsx mentioned. If i cap the exit with my hand and suck the air out through the top end cap wouldn't that remove all the air from that loop? or is that check valve needed to continuously keep air out? thanks, btw your vids have really helped a lot in my build! keep up the good work!

@P1sc0Ler0 9 жыл бұрын

Great job, Im planning on building one for my 90G tank, Whats size pipe and im looking to get? Is there a guideline for sizing the pipe? Thanks..

@comedianmattrossey 10 жыл бұрын

Hi Joey, Thanks for all the great aquarium DIY. I just started a tank up after not having them for years and the tips, tricks, and advice from you have been great. I've run into a problem though, and cant figure it out. I built an overflow, but cant get it to flow. I only made one change and that is the direction of my exit pipe. It seems like I cant get the air out to create the suction to prime the overflow. Any thoughts as to why? Im totally stuck.

@mikerobling1056 10 жыл бұрын

Did you suck the air out of the check valve? I have mine hooked to a power head in the tank so it always self primes

@RSkywalker73 11 жыл бұрын

You are the exit to my headaches, may I change the length of the tubes based on your explaining? I mean what if I want the sucking side to be in the bottom of the tank, would that work if I drain all de air with the valve? or maybe if I have to adapt all the tube´s length to the height of the tank and my sump filter? please answer.. TY

@musicmixcapecod 7 жыл бұрын

Good video, I am building this using your video as the template but the only difference is the point where the water exits will be different for me. I will build the overflow exactly the same with an additional 90 pvc fitting right where the water exits and run it straight down to my refugium. Will this create a syphon since it drops down again or will it work the same if I build it exactly the same and put the 90 on the end of that piece you showed the water exiting out of?

@neilwolfendale3110 10 жыл бұрын

Hi Joey, If the volume of water for a 0.5 inch overflow pipe is 90 gals, is that 90 gals entering the tank or is that 90 gals of water at the pump not allowing for the head height?

@leovatkin8600 9 жыл бұрын

Joey, Question reg. flow rate. Tank is a Red Sea 250 (D). I will have a sump below with an Iwaki 40RLT as my return. I have a Tru union ball check valve and another ball valve connected. (both are right off the pump) 2nd ball valve will be to adjust flow. the return is going up roughly 5 ft (chiller will be in between). I was planning on doing a 1" overflow, but now I see It should be at least 1.25" if not 1.5". Uncertain what will be best. While I will have my skimmer down below, I am uncertain I want to undertake making two of these let alone one. I am excited to make this work, and with a Hofers gurgle device over the intake, I can't see why I should make two overflows. Believe me, I am someone who doesn't like to leave anything to chance. And I do get the idea of "better safe than sorry". But I thought if properly done, I should be OK. . If you do strongly recommend doing two overflows, should I then use 1": or 1.25?? I'm taking my time on this and really want to do it right before I put a single drop of RODI in this tank Thanks for any input you can give!

@eddy.saputra 6 жыл бұрын

Greate video sir..btw..what the meaning diameter here..? Its pipe diameter or else..?

@garystaud5022 11 жыл бұрын

Nice collection of videos. Since you and other recommend two overflows to guard against clogs (etc.) what about a dual setup? I've seen other vids but want to keep any such twin overflows on one side so the return is on the other. Any suggestions as to how you'd couple two of your designs together. Ideally there would only be one pipe to sump, but perhaps that defeats the whole purpose. Thoughts?

@edgarpineda3417 11 жыл бұрын

What up joey for the over flow you said you should have two running if the same diameter over flows wont that cause flooding if your return pump is inly returning half the amount of water ?

@turtlegeddon8719 11 жыл бұрын

hey can you make another video explaining of bigger pvc for larger aquariums

@aquarepublic9864 10 жыл бұрын

Can you please talk about setting up a nano reef tank and the costs involved

@zamora3D 8 жыл бұрын

How does it stay siphoned when power cuts out? Doesn't the half part where the water exit be empty too?

@Jo-LaneB 10 жыл бұрын

Hi Joey, thanks for your videos. I'm trying to build this overflow but cannot find 1" street elbows. Can you share where you got yours please.

@wheresmyspanner 11 жыл бұрын

Hey man, your videos are great! I'm setting up a salt water tank and I have a question, I have a 37 (US) gallon tank, and I've got a Fluval U3 (600L(158 Gallon)/Hour) internal filter. Would this be sufficient to run in the tank with weekly filter cleans? Otherwise I was thinking about using your tut to build a sump with this filter and a protein skimmer combined in. Hope you get back to me, Cheers!

@sammann5716 10 жыл бұрын

This looks really Nice and easy to make, Marvelous Idea you have here, I know I asked the same question at one of your other videos too, just in case if you checks this one first. My question is, does it loose the syphon over time and if it does how would I prevent this? Please help

@thekingofdiy 10 жыл бұрын

The only way for it to lose siphon is if it is leaking air... if properly built, it will never leak air.

@sammann5716 10 жыл бұрын

Thanks for the quick reply, wouldn't air bubbles travel with the water, just curious as you had been with the aquarium systems since a long time and I am real new to aquariums.

@kunlequashie6246 11 жыл бұрын

Hey Joey, good video. I have a sump at the same height of my main aquarium, can this overflow still work with my sump I really nee to know. And if it doesnt, what would you suggest i use if i dont want to drill my tank