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Aquarium Advice Freak
My grandfather has a 55 gal community tank. He has 5 angels, a large parrot fish, a powder blue gourami, and 4 cories. In the past week he has lost a large pleco and all the cories. The tank has been running for about 6 months. He told me that his parrot fish has white spots on its fins and he believes that they are on his gills too. My first opinion is that it is ich, but he hasn't seen the fish scratching on decorations. He says the fish just seems to be moping around when it is usually a very active fish. I am going tomorrow to test his water, and told him until then to do a water change. I don't believe that he has changed the water in the past three months, and with the pleco and cories dying, I am led to believe that there may be an ammonia or nitrate issue. Is there any other disease that the parrot fish may have that anybody knows about? TIA