I need help! I just joined was told about you guys through my local fish store. I have a texas fish that has recently fallen ill that I don't know what is or how to treat it. He first got an abrasion on his side which I thought was from fighting there is him a female and a green terror in one tank but in the last 3 days He has gotten very bad LOOKING. He still acts like a fish eats and everything else but also appears to be blind. I'm concerned for him and my other fish. My water peramiters are good. And always have been. Tank is cycled and been up for about 2 years. Plenty of filtration and 2 50 percent water changes a week .Any info would be great!