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What is this gas?
So I accidently killed some of my fish. Have a 14 G Biocube that was well balanced. Put in a new Dwarf Gourami and two days later noticed he had Ick (first experience with this) Took him out and put him into a big vase (figured since he was related to Betta's, he'd be okay a while...and he has been) but thought I probably needed to treat my tank for Ick. I several Amano and Cherry red shrimp as well as some snails, so by my research, I couldn't use a copper Treatment. Decided to take a chances and use Super Ick Cure by API. No problems for 5 days, but this morning before work, water was slightly cloudy. Didn't have time to change do anything (fish all happy and hungry), but when I came home, two of my three guppy's were dead as well as one bubble molly, my big snails (forgot what they are called) and innumerable spiral snail infants. So to my question, the water looked almost like a can of cloudy sprite with lots of small and large bubbles coming from my plants and the gravel. I assume this is the result of fermentation from some of my fish/snails croaking (some shrimp still live!!), but do you think this was CO2, Nitrogen, Hydrogen sulfide? The water was a little smelly and I tested the water for nitrites/ammonia (API test tube tests) and both were negative. Unfortunately, can't test for pH. Just curious and a little sad (bubble molly was such a happy fellow)
Originally Posted by medtoad View Post
CO2 wouldn't normally build that way either as any surface agitation would get rid of it pretty quickly.
First question would be what is your substrate?
My condolences on your losses :(