Just checked the water and the ammonia is high. She is in with a 5 inch silver arowana, 3 clown loaches, 6 inch female jack demsey, 2 angelfish, 2 inch archer fish and 2 inch polleni. I noticed too the arowana has cloudy eyes as well, so in the process of a water change. I have two fx5's running on a 150 gallon, a fluidized sand bed filter and a UV sterilizer, so I think its sufficient filtration. Thanks for bringing up the ammonia stupid me forgot to check that!