I checked the levels of my fish tank that is on its 15th day of cycling everything seemed fine, where is should be according to the apI master kit...everything but the ammonia. Now I'm no fool I know what ammonia can do to a fish so I started googling a better way to test for free ammonia since the apI test can't tell ammonia and ammonium apart. I found the seachum ammonia (free and total) test kit and I bought it with out hesitation. The ammonia is laying around at 0.1 ppm (at least I think it tests at ppm) but its EXTREMELY low on the scale that goes with it, we also have top fin ammonia remover and we have been using that. I'll post pictures of where the ammonia is but the ammonium Is out of control. This all boils down to one of my three ryukins in my 50 gallon tank. When we got him he was just orange and white but hes gotten bigger and we don't know if hes just changing colour or some how got ammonia burn....but we don't know how since it's so low or if I'm missing something I'll also post a picture of him as well.