IN short I've been living at this address for roughly 4 years and recently my stock have started exhibiting signs of ill health. Went through a number of checks and found out that my ammonia levels are no longer 0ppm. I thought That perhaps it was a spike as I removed a few rainbows to a back up tank for a week and then returned them to the main tank (spawn) But I've just conducted 6 test using nutrafin liquid test kit and I have low levels of ammonia present.
What do you suggest my next step should be?
What do you suggest my next step should be?