The InLine CuLator Filter System for pros! Designed exclusively for authorized dealers and pool professionals. Each CuLator filter removes and eliminates 8 ppm from 20,000 gallons. That’s 16 ppm from 10,000 gallons! Essential for new pool construction, large pools, well water pools, commercial pools, and general maintenance for backyard pools. The CuLator Inline Pro is designed for easy installation and quick filter changes. The life of the filter depends on how much metal is in the water…it can easily last 3-6 months. Notice to Flint Michigan: CuLator InLine Pro filters take out LEAD from your swimming pools!