I'm having issues with ammonia levels in my freshwater tank. This tank is lightly stocked, well maintained and previously cycled but lately my ammonia levels keep climbing up. I have performed numerous water changes to help keep the levels down but nothing seems to work. I have conditioned the water, added API Stress Zyme, API Stress Coat and API Ammo Lock, but last night my ammonia levels spiked to 8ppm.

I am at a loss!

2013-12-27T10:37:59Z[GMT]