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    Old HTH 10% vs. New Great Value 8.25%

    There is a sale currently going on at a local Stine lumber. HTH 10% is $2.50/gal Date on bottle is February 24, 2015 $0.195/ounce of Sodium Hypochlorite Great Value 8.25% is $2.94/121 ounces Only a week old $0.295/ounce of Sodium Hypochlorite Is it worth...
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    Slamming with questions

    1. I removed the light from the niche to clean it. Should I leave it out or replace it into the niche during the slam? 2. Can I test FC with only 5 ml of water and using 1 ppm per drop?
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    problems with Hayward filter

    I'm new to the pool world. The pool has been a swamp for 2-3 years. On April 23 I dropped 12 Lbs. of dichlor in the pool. Then noticed my polaris picking up sand so I changed the sand and a busted lateral(sand from home depot). I'm thinking this sand was a mistake as it is not removing anything...