Robarb 20154A-12 Super Blue Swimming Pool Clarifier, 1-Quart, 12-Pack

The ideal hardness level is 200-400 ppm1 ounce of product per 500 gallons increases hardness by about 10 ppmThis product is used to increase the calcium hardness in spas and...

Helps prevent metal staining and corrosionUse this product when filling or refilling your spaAdd 16 ounces of this product around the spa waterline for each 625 gallons of spa water

1 quart per 10,000 gallons of waterHelps remove and prevent calcium, cobalt, copper, iron, lead, manganese, nickel and silverThis product helps prevent discoloration of pool water due to iron, calcium,...

Add 1 ounce per 5,000 gallons of swimming pool waterClears cloudy and murky waterTurns dull water a bright sparkling blueFast-acting and easy to usePowerful clarifier, sequestrant, chelating agent, and flocculant

Add 1 ounce per 5,000 gallons of swimming pool waterClears cloudy and murky waterTurns dull water a bright sparkling blueFast-acting and easy to usePowerful clarifier, sequestrant, chelating agent, and flocculant

Fast acting hot water formulaFor natural, clear water in your spa or hot tubAdd 2 ounces of this product for spas up to 800 gallonsUse at least 2 times per...

Helps prevent metal staining and corrosionUse this product when filling or refilling your spaAdd 16 ounces of this product around the spa waterline for each 625 gallons of spa water

Helps prevent metal staining and corrosionUse this product when filling or refilling your spaAdd 16 ounces of this product around the spa waterline for each 625 gallons of spa water