I have a DE filter and trying to clean a green pool. I had to wash and precoat the filter twice a day because it got dirty and stopped flowing quickly. I'm thinking about getting a new sand filter. My in ground pool has about 30000 gallons water and the pump is AO Smith, 2HP. Right now I'm looking at Pentair Triton 2 and Hayward Pro series. Can somebody help me choose the filter? I appreciate your help.