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Thread: calculating di-chlor to gt CYA to 30

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    calculating di-chlor to gt CYA to 30

    I am ready to switch to the di-chlor/bleach method of sanitization.

    Just want to make sure I am figuring this correctly.
    For my 330 Gal sap, PoolMath says that 10ppm FC is about .8oz di-chlor

    Since 10ppm of FC via di-chlor raises CYA by 9ppm, I should be adding a little over 2.4 oz of di-chlor to get to the appropriate CYA level (I can always test with my TF-100).

    SO, if I set aside 1/3 cup of di-chlor (about 2.6oz), I should be able to use it to sanitize and when it's finished, I should switch to bleach. My target would be to keep FC at 5-6ppm with the bleach. but never drop below 3.

    Does this plan seem reasonable?
    TF-100 Test kit, 24,000 gal. free form Vinyl. mybluepool AC-600 SWG, STA-RITE S7MD60 DE filter, 3/4 HP STA-RITE MPRA6D pump, Polaris 280 w/booster, Raypack Propane heater, Looplock mesh cover; All located in New England.

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    Re: calculating di-chlor to gt CYA to 30

    You can check the effect of adding different chemicals by using the thing at the bottom of the Pool Math page.
    Bob - Palm Beach by San Juan Pools. approx 5000 gals., Pentair 320 cartridge filter (all new guts installed by me), Goldline SWG, 'New to me' Kreepy Krauly Sand Shark, Intermec 104 Timer Test kit: TF-100 w/Speed Stir

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    Re: calculating di-chlor to gt CYA to 30

    Quote Originally Posted by pabeader View Post
    You can check the effect of adding different chemicals by using the thing at the bottom of the Pool Math page.
    Cool.....didn't know that. Looks like I am right on
    TF-100 Test kit, 24,000 gal. free form Vinyl. mybluepool AC-600 SWG, STA-RITE S7MD60 DE filter, 3/4 HP STA-RITE MPRA6D pump, Polaris 280 w/booster, Raypack Propane heater, Looplock mesh cover; All located in New England.

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    pabeader's Avatar
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    Re: calculating di-chlor to gt CYA to 30

    I kinda thought you were, but that tool is often missed so I took the opportunity to point it out
    Bob - Palm Beach by San Juan Pools. approx 5000 gals., Pentair 320 cartridge filter (all new guts installed by me), Goldline SWG, 'New to me' Kreepy Krauly Sand Shark, Intermec 104 Timer Test kit: TF-100 w/Speed Stir

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