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Thread: rain and cya

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    chubbiegull's Avatar
    Join Date
    Oct 2015
    Location
    Charleston SC
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    14

    rain and cya

    How does rain effect the cya level in my pool. Charleston SC - 23000 gallon rectangular pool. Current cya level is 65 which according to the pool calculator should be around 40.

    we had 18 inches a month ago and 4.5 inches in last couple of days

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    Mod Squad JVTrain's Avatar
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    Feb 2014
    Location
    Central Minnesota
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    Re: rain and cya

    Rain can dilute your CYA but most of the time, you mix rain water with the pool water so you're not getting full replacement dilution. When you need to drain due to overfill, you're removing pool water mixed with rain water not just pool water so the dilution is less. What level was your CYA at before the 18 inches of rain?
    Joel - TFP Moderator - Minnesota - **Become a TFP Supporter!** Helpful Links: ABCs of Pool Water Chemistry - SLAM Procedure - Chlorine/CYA Chart
    40x20 Pool: 32K Gallons * Vinyl * Bleach Chlorination * Hayward S270T Sand Filter * Pentair SuperFlo 1 HP * Teledyne/Laars Heater * AquaVac Tigershark * TF-100 w/ SpeedStir
    Isolated Spa - 345 Gallons

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    chubbiegull's Avatar
    Join Date
    Oct 2015
    Location
    Charleston SC
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    14

    Re: rain and cya

    i really dont know. Just bought this house. First pool for me. Found this site and felt like I could use methods here to maintain it myself.

    This was the first test I did - last thursday. My son lives in the house, he has been treating it with the tablets and shock. I told him we were going to try and switch to this method.

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    Join Date
    Sep 2013
    Location
    Charleston, SC
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    535

    Re: rain and cya

    Welcome. I just sent you a private message as i too am in Charleston.
    5900 G Fiberglass IG pool (circa 1990), SWG Hayward Aqua Rite GoldLine (2013), IntelliFlo Variable Speed Pump (2013), Hayward Pro Sand Filter (circa 1990), Well water (no iron or other metals fortunately), test with Taylor K2006C, Charleston, SC

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    Join Date
    Jun 2014
    Location
    Houston, Texas
    Posts
    447

    Re: rain and cya

    heck, ya'll. Welcome to my world of rain and drain....have drained ours five times since we filled it!
    19k SW IG
    Wet Edge pebble tech = new 5/16 (replaster)
    Hayward variable speed pump (new 6/17) /Shark for cleaning
    New - filled 10/18/14 - TFP 100 test kit

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