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Thread: Is there a way to calculate CYA includes with dichlor?

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    Is there a way to calculate CYA includes with dichlor?

    I've seen a lot of postings about concerns about too high CYA levels when using chlorine products. I seem to have the opposite problem.

    I have a SWG and often times my CYA always tends to drift downwards thru the course of the year (more so in summer). So I find I need to add more conditioner. But I find conditioner to be expensive. Also, I also like to shock my pool with dichlor, as it raises my chlorine level quickly, dissolves fast, and also bumps my CYA. So how can I calculate how high my CYA level will rise with dichlor? I don't really see any mention of how to calculate this anywhere.

    20,000 in-ground pebble-coat pool with 60sf Jandy DE filter, Pentair Variable-Flow pump, Goldline Aquarite SWG, Dolphin Premiere robot, passive solar heating.

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    Mod Squad jblizzle's Avatar
    Join Date
    May 2010
    Tucson, AZ

    Re: Is there a way to calculate CYA includes with dichlor?

    look at the bottom of the poolcalculator. It will tell you effects of adding chemicals to your pool.

    Posted from my Droid with Tapatalk ... sorry if my response is short
    Jason, TFP Moderator
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    y_not's Avatar
    Join Date
    Jul 2012
    Redmond, OR

    Re: Is there a way to calculate CYA includes with dichlor?

    How come you are losing CYA throughout the year?
    Excessive backwashing, splashout, leak? Ammonia producing algae?

    CYA doesn't evaporate with the water, it's just like salt, it stays behind.
    It's normal to lose some, or even all of it over the winter if you get bacteria or algae in there that eats it, and you loose a little from normal splashing and backwashing.

    But you shouldn't be losing a whole lot, just a little.
    Thanks for reading... - Tony
    Da' Pool: Intex 15'x42" 3284gal AGP EasySet (Inflatable Ring) - (Summer 2014: 27' round EW /w 6.5' deep end @ 22,500gal)
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    Join Date
    Mar 2007
    San Rafael, CA USA

    Re: Is there a way to calculate CYA includes with dichlor?

    As was mentioned, The Pool Calculator will tell you the effects for adding chemicals. For every 10 ppm Free Chlorine (FC) added by Dichlor, it also increases Cyanuric Acid (CYA) by 9 ppm.
    16,000 gallon outdoor in-ground 16'x32' plaster pool; Pentair Intelliflo VF pump; Pentair IntelliTouch i9+3s control system; Jandy CL-340 square foot cartridge filter
    12 Fafco solar panels; Purex Triton PowerMax 250 natural gas heater (200,000 BTU/hr output); automatic electric pool safety cover; 4-wheel pressure-side "The Pool Cleaner"

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