Hi everyone. First I want to thank anyone that reads this and helps me. My pleco is bad sick. He's almost 9 years old. He's in a 30 gallon tank. Everything was fine until he developed this tumor. It is on his face, right under his eye. It looks like it exploded and it's bleeding and the tank is very cloudy and no matter how many times I change the water and the filters, it is still cloudy. It has to be from him because he's sick. Please tell me what to do. I've spent so much money on new gravel, new filters, Tetra Easy balance, Tetra water clarifier. I bought him 2 new Aquatech filtration systems and they both have 2 filters each, thats 4 filters and I change all 4 filters twice a day, and it doesn't matter. Now I just bout Tetra lifeguard and I'm going to try that. Other than that, I don't know what to do. Please someone help me.