1. ## What chlorine should I buy?

Hi, Soon I will own a new house with a pool. This forum is helping me understand how i should take care of the pool.

Here in Puerto Rico I can only find 5.25% or 8.25% bleach at Walmart and Sams. The 5.25%(Great Value or Member"s Mark) at \$1.50 for 128oz and the 8.25%(Clorox) at \$3.26 for 121oz. What chlorine should I buy considering the price difference and chlorine concentration?

Thanks

2. ## Re: What chlorine should I buy?

From a cost per active oz of chlorine perspective, the 128 oz 5.25% concentration is the lower cost option at a cost per oz of Active ingredient of \$0.22 vs. \$0.33 of the 121oz 8.25% container.

The formula to determine this is: Container Price/(Container Amount * Strength Concentration)

• 128 oz 5.25% option: \$1.50 / (128 oz * .0525) = \$0.22 cost per oz of Active ingredient
• 121 oz 8.25% option: \$3.26 / (121 oz * .0825) = \$0.33 cost per oz of Active ingredient

BTW, here is a chlorine cost calculator in spreadsheet form that someone shared out on Google Docs a while back: Chlorine Cost Calculator

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