Natural Chemistry 05236 Spa Swimming Pool PHOSfree Extra Strength - 3 Liters

3 liter bottle Eliminates phosphates in pool water effectively Do not allow the pressure in the filter to rise to 10-12psi above the starting pressure. Use all season long or for pool closings in the fall Dosage: Initial dosage 32 ounces per 10,000 gallons for over 1,000 ppb of phosphates. Maintenance dosage 4 ounces per 8,000 gallons