Big thanks for doing this in English ,really helps a lot

Thanks for doing it in English 👍

Thank you sir! Great info for a newbie like me!

Great advice, much to learn in this new hobby, thank you 👍

What a great video Stefan! You made some very interesting point. I will try that on my pond 💪

I just found your channel. This late bit of advice is to add Folic Acid supplement tablets into the pond water as it goes into the filter. I had a 10000 gallon/40000L pond that I would put a dozen or so tablets every day for about ten days. Folic acid is very cheap and works wonders. Add every time that you work on filters, clean ponds, etc. The good bacteria eat the folic acid and makes them stronger, reproduce faster, and they will continue to function much later into the cold months. Plus the filter will recover faster in the Spring when your season begins again.

What a great video. Keep making them in English :)

Excellent 👍 Advice !

Thanks for the English version 👍😀

Thanks 😮

Thanks for the video it was really very interesting. I am new to the Koi hobby and have recently built a new 3000 gallon pond with 6 koi in at the moment, they where introduced in mid august 2019. My filter is a nexus 220 with extra K1 added in the outer bio chamber and a superfish 12,000 litre water pump and also airation to the nexus and gravity fed bottom drain. I've used a lot of evolution aqua pond bombs to help kick start the filter and to establish it. The K1 in the bio chamber is still quiet a light colour. I was feeding my fish 2-3 times a day upto November and now feed twice a day. I also have a Air source heat pump on the pond and maintain a constant temper6of 14.5c My Ammonia started to rise in october but the Nitrite was clear with no reading. However the Ammonia has now started to reduce almost back to where it should be but the Nitrite has now spiked to a high level. I've been advised to keep a hose on the pond with a trickle continuously and clean the nexus every other day, but your advise and method seems to contradict this advise and so I'm a bit confused with what action to take to remedy the situation. Can you advise or help further please. Thanks Andy

thanks Stefan, great video

Thanks for sharing! 👍🏻👍🏻👍🏻

Is koi flashing sign of high ammonia/nitrite?

Really helpful content sir. I have a query regarding the filtering part. I have a biofloc culture but some fish don't eat flock, so that leads to excess sludge in tank. So I have decided to put up a filter which will remove the solid mass constantly but that won't remove the ammonia, so will the biofloc bacteria contain the ammonia. Can you give a suggestion in brief how to deal with it. Regards, Hardik

Thank you

good morning sir, I'm Sai from bohol philippines,thank you for making this video,so helpful to everyone specially people like me,new beginner in koi pond, because NITRITE is my big problem us of now in my koi pond,my koi pond sir is about 750-gallons of water, and my submersible pump,4000L/H is that Okay Sir.....?

With feeding the koi more, I would have to backwash more right? I do notice my koi stress and flash in the evening.. feeding them at night will help?

Can you make also how to reduce nitrate video?

very interesting new subscriber

Thanks for this video. I have problem with nitrite. I'm growing denitrification bacteria in a 1000 liter pond of sea water using ammonium hydroxide to feed the bacteria (no fish in there). I put also starter bacteria in that pond. After about 20 days, ammonia declined to zero and nitrite was very high. The nitrite is still very high until now (30 days). Aerator runs 12 hours every day. What's wrong so that the nitrite does not decline? Thanks in advance.

Wow , thankyou

damn my pond is 4000 L, my pump is s 20 000 LPH. no wonder nitrite level is always high. bacteria in filter doesn't have enough time to digest.

You have only talked about feeding. How do you control ammonia and nitrates

how to remove 0.25 ammonia? my pond is 40 tons and about 20 kg k1 moving bed bio filter and also have a shower. We test water always and the reading is 0.25 ammonia, 0 nitrite, 10-20 ppm nitrate. what is your advice? we cannot get rid of this 0.25 ammonia

Interesting take on feeding 24 hours a day. I have never heard that before. I believe the problem though for most koi keepers (hobbyists, not retailers like yourself) would be finding an auto feeder capable of that many multiple feedings and at a reasonable cost. Any thoughts in that regard would be appreciated.

Hi, can you help please. Ph6.5 ammonia 0.5 nitrite 0.5 and Nitrate 10.0 what can I do, the pond is 5000ltr and I have a koi multibay filter system so it goes into a whirlpool then into brushed and jap mat and then into k1 media, the pump is 9000ltr pH pump. I've done water changes etc but my readings are not changing.

My pond is about 5,500 litres. Ammonia 0 but nitrite maybe 0.5-1. I only have 12 reasonably sized fish. How do you know how much to feed? I’m worried about over feeding and making the matter worse? Thank you

Just started a new pond and have got new pond syndrome fish struggling, ammonia was 1.5 got it down to 0.5 now, been told to stop feeding but seeing your video not sure that’s the best thing to do what you think cheers.

Hi, my pond is about 2 month. My ammonia is 0ppm but my nitrite is 2ppm. Please advise and what should i do? Many thanks

Could you help I have a 5000ltr pond my ammonia isn't going down it at either 1ppm or 2ppm but the fish are not showing any stress at all and are always hungry and happy but my nitrite is reading at 0 but I don't want to cause them stress by not feeding them but do you think I should stop feeding.

Beste, ik heb last gehad van een zeer grote algenbloei, heb een uvc filter gekocht(kleine 2 weken geleden), nu zijn de algen allemaal weg, ik merkte dat mijn koi gisteren redelijk inactief waren, heb de ammonia gemeten en die gaf 1.5 aan, heb onmiddelijk zeoliet en bacterien gaan kopen, heb ook ongv. 15% water ververst. Vandaag opnieuw gemeten en het is nog steeds 1.5, wat raad u aan?