I have 7 fishes. None of the others are sick. The water is fine. I've become quiet the fish pro in the last 7 months especially what all the trouble I was having with the water levels. I have two gourami fish ONE IS PERFECT, beautiful happy. I have a second that isn't looking so great. His fins are all clenched together. He's eating and pooping. He's has a white spot it's NOT ICK it's been there for a while. he hasn't lost his color, he swims, he just doesn't look well compared to his brother. And all the other fish snap at him, so I know he's probably ill...