I had a parrot fish die suddenly this morning, And I decided to test the water and my ammonia is real high (about 4.0). The dead fish has been in the tank for about two hours before removal. Can this dead fish cause an ammonia spike that quickly?
I was a bit brief, but my tank has been running for years, and I cannot imagine what could cause the spike. I certainly will address the high ammonia, but how long does it take a dead fish to cause an ammonia spike?