JACK'S MAGIC Quart Metal Solution - The Blue Stuff® soil-moisture-crystals Pentair R173217 200 Square Feet

Pentair R173217 200 Square Feet Cartridge Element Replacement Clean and Clear Pool and Spa Filter

The six-position Hi-Flow™ Valve has a manual air relief valve and a sight glass to make inspection

Combined Acid Gas cartridge with P100 particulate filter

Controls metal staining

Phenol Red

JACK'S MAGIC Quart Metal Solution - The Blue Stuff® soil-moisture-crystals Pentair R173217 200 Square FeetThe Blue Stuff does everything "The Pink Stuff" does and more. The Blue Stuff's proprietary blend actually removes copper from the water. The Blue Stuff is also very stable in higher chlorine levels and can be used in many fountain and water feature applications. Dosage: Initially, add one quart (32oz.) per 10,000 gallons of pool water then 6 8 oz. per 10,000 gallons of water per week for maintenance.