Could someone please help me. I've had fish for many years,and never had a problem with cloudy water. I changed my tank over to cichlids about two months ago. Everything was fine my water was crystal clear up until 2 weeks ago. I brought a sample of my water to petland discounts and they said my water was perfect after they took 5 viles of water that I brought them. They said the only thing that was high in my tank were the phosphates. So they sold me this sponge type thing to put in my Fluval90 submersible filter. That didn't work .I did another 50% water change and the water was clearer but not 100%. I don't know what else to do. I'm very frustrated because I never had this problem before.