Hi, I just bought a house and got the pool with algae, Realtor just got algae cleared up on prev. owners dime. PB said I need a new filter, and I believe him as I am not seeing much flow and I only see good flow for one hour after cart cleaning. But don't find much gunk in the Cart. I am convinced to get a DE filter, might help my allergies. My backyard has lots of trees which I am going to clear but will still have my neighbors Pine Needles in my pool ( Thought of installing skimmer socks). Please help choosing Filter and recommend Pump Replacement. PB recommends QUAD DE filter with 1 HP VS pump. I think I'll have to spend a lot on replacement Carts on Quad DE. so was leaning towards Grid type Pentair or any other brand. I am open to plumb a separation tank if you think I would be backwashing more than once in 6 months. I could open it up in 6 months. Plan to use DE subtitutes. I am now following TFP method, great site.