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Fish tank water smells, and all the fish at the top?
I have a 55 gallon tank, with 7 danios, and 2 guppies. Earlier today I added 2 of the danios, and 2 guppies.
My water now smells really bad, and all the fish are hanging out around the top. I tested my water, and I have 0 ammonia, 0 nitrite, and very low nitrate (undetectable). Before I added the 4 fish today, I did put in some API Quick Start, to help compensate for the extra fish.
Any ideas on what is causing the smell/hanging out on the top?
