Appreciate all the responses. I am going to get the test kit tonight and make sure he stays healthy. I am also going to get a larger tank so he can have more room and also give him some company. A 20 gallon is a little small, but since he's a spot and not a LM, I started with a tank I already had. Also, after reading about nitrates, that explains alot. Sometimes, I bought a dozen minnows and threw them all in at once. He would gorge himself right away and then wouldn't eat a single one after that. He would kill them all and let them die. I guess all those fish caused a nitrate spike.