I have a Summer Waves 10,000 gallon pool and the tiny filter/pump wasn't cutting it. I got hold of a Jandy Stealth pump and an upright cartridge filter from Sta-Rite. I am losing good suction after if runs for a day but the filter is not clogged with debris so I can't figure out the issue. My pool was did have tons of algae so I ended up dumping the water and starting fresh. I wonder if I killed the filter cartridge since even after soaking it in cleaning solution it still loses good suction after a day or so.
Any ideas for me? Thanks
Any ideas for me? Thanks
Based on what you're experiencing, I believe the first place we would start is a full set of test results from a TF-100 (link below) or Taylor K-2006C test kit. While a full water exchange probably helped considerably, there may still be some organic material affecting your filter, even if you can't see it with the naked eye. Also tell us how you usually chlorinate your water. 
