SeaKlear Pool Particle Removal System is a patented, two-stage system proven to enhance filtration in pools, spas, and hot tubs. This product reduces water's turbidity and recovery time, especially during peak bather loads. Pool Particle Removal System is now EPA approved to effectively trap Cryptosporidium in the filter thereby reducing E. coli outbreak risk. It enhances filtration down to 0.5 micron.