So I have had a 10 gallon fish tank all my life and I only had cloudy water once and it was after cleaning the water. So I used to have gold fish live 3 years then die due to my brother well any way. I have a 37 now and I get cloudy water and it just keeps getting worse. So I did a 80 percent water change and gravel clean. When I used the gravel cleaner it was pulling Green cloudy stuff and lots of poop. And it seems I always have cloudy water and I'm 16 so I don't have money to go get tap water fixer or anything like that. I have 3 gold fish 2 and a half years old. A octopus one new and I had a gold fish but he died and he go stuck inside my shell in the tank. I have a top fin 40 and the top fin internal 40 ml. I'm so sick of the cloudy water. Oh and my filters are green and never like brown. I have a heater. I don't know what to do and when I did the 80 water change it looked good where there was no water just want it to look normal.