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Pristine Blue Pristine pH Down (6 lb) is used to decrease pH and total alkalinity levels in pools and hot tubs. Proper pH levels allows your other chemicals to work more efficiently and increase bather comfort.
4 oz per 5,000 gallons of water will decrease pH levels by 0.4 ppm.
0.75 tsp per 400 gallons of water will decrease pH levels by .4 ppm.
Measure the pH of the pool with a reliable test kit or strip. Using the table on the bottle or approximately 4 oz per 5,000 gallons of water for each .4 ppm desired ph decrease determine the dosage of this product to add to your pool. Ensure the circulation system is on and functioning. Broadcast this product evenly over the surface of the pool. Water may be retested and additional product added as needed, after 4 hours. Caution: Do not add this product into skimmer, near underwater lights, near metal ladders or fixtures. Do not add water to this product. Always add this product into water. Do not add more than 32 ounces of this product per 10,000 gallons of pool water at one time.
Measure pH with a reliable test kit or strip. If pH is above 7.6 add the recommended dosage of this product from the product bottle or approximately .75 tsp per 400 gallons of water to lower pH by .4 ppm. Pre dissolve the product in a bucket of water and then add to spa. Circulate water for at least 30 minutes. Retest pH and repeat treatment, if necessary, until phH is in the proper range of 7.2 to 7.6.