My tank is rapidly producing high ammonia levels. I preformed a 50% water change yesterday after the water settled I tested and got some where between a 2.4 and 3.7. I treated the water with ammonia neutralizer and 30 minuets later tested again and got a 0. Today I tested again and got 3.7. My puffer is in a 55 gallon tank alone, with two filters made for a 75 gallon tank they are 265 gph a piece. There is fresh carbon in them...what is happening? I also rotated the sand when I did the 50% change. So I don't have any fears of methane build up either. I use the net and scoop out any left behind food and any feces he may have dropped. I'm at a loss here. The water is crystal clear and my puffer is acting fine, his coloring is normal and eating normally.







