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baos · 07-05-2009, 09:53 AM

heres my theory but I no longer have an issue. My walstad tank was producing a lot of co2(bubbling a lot). I only filled the tank 2/3 of the way because at that height I'm barely meeting 2wpg. I think the surface of the water for my surface breathers was mostly co2. There is no bad smell. I added an air bubbler to the powerhead and have had no problems since.

07-05-2009, 09:53 AM	#4 (permalink)
baos Junior Member Join Date: Jul 2009 Posts: 18 iTrader Ratings: 0 Plant Points: 1250	Re: lethargic corydoras heres my theory but I no longer have an issue. My walstad tank was producing a lot of co2(bubbling a lot). I only filled the tank 2/3 of the way because at that height I'm barely meeting 2wpg. I think the surface of the water for my surface breathers was mostly co2. There is no bad smell. I added an air bubbler to the powerhead and have had no problems since.