Hi, I just bought a house with a pool (around 17,500 gallons, vinyl liner) and the pool has a ton of pollen, maybe dead algae, sitting on the bottom. I have a cartridge filter and I have been trying to vacuum all that stuff out but I saw it was coming out of the jets . I tried vacuuming a small part of the pool, cleaning the cartridge and continue vacuuming but the dirt comes out of the jets almost immediately. In the past two weeks I have tried several methods to clean the cartridge (products made for cleaning them, TSP and 1:1 acid baths, etc) but the dirt keeps coming out of the jets when vacuuming. I finally gave up on the existing cartridge since I believe is clogged and bought a new one. My question is how should I clean the new filter cartridge after vacuuming all that dirt? I don't want to ruin it right away.