Ammonia, Nitrites, and Nitrates are all fine.
When I open the top of the tank, it smells faintly like a gym bag that's had sweaty socks in it for four days.
I've had a 35 gallon tank for a few months... no problems up until now. So I don't know much at all.
My dwarf blue gourami is definitely not feeling well... it started the night before last... in the past, when he has claimed a territory, it has always been the bigger shelter I have in my...