Directions for use:
Sanitizer level should be below 5ppm before adding this product.
New pools, openings, & initial phosphate removal:
Note: Do not backwash/clean the filter for 48 hours after adding this product.
Note: This product removes 300ppb of phosphates from 20,000 gallons.
For opening: Test phosphate levels weekly and treat as necessary in order to maintain phosphate levels 100ppb or lower.
For closing: Phosphate levels should be 100ppb or lower for optimal results.