[nitrofish]

I had the impression ammonia peaks and drops down once it produces nitrite and then the nitrite peaks before producing nitrate. no mater how small the fish are it still has to hit unsafe levels before going back down.

maybe he dosen't cycle the tank, but maybe he is still doing water changes, and the fish are to small to produce enough ammonia in the water between changes to hurt them.

 

[nitrofish]

I have had my tank cycleing for 3 weeks now, and I still cant get any ammonia readings yet.

maybe 13 goldfish in a 90 gallon is not enough?