When I have 0 amonia , super high nitrite and nitrate. I had like 24 goldfish in the tank and added bio spira. I got the ammonia down to 0 and only have 1 goldfish in there now. This is a 75gallon tank, and I have done a 50% w/c.
it has 2 sponge filters that are for 75gallon tanks, and a emperror400
it has 2 sponge filters that are for 75gallon tanks, and a emperror400
You have got to be kidding arrow a 91!