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Thread: Lowered my CYA from 200 to 45

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    Join Date
    Apr 2015
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    Lowered my CYA from 200 to 45

    Bought a house with a pool last year and started trying to figure out how to keep the chemicals balanced. Took water in for testing and everywhere in town told me that CYA levels were part of some witchcraft science and to never worry about it.

    Started following this site and decided to get pool in shape for this summer. Every time I vacuumed, I set the valve to waste and replaced about a foot of water 10 times. Then over the last two weeks, I have drained the pool to 50% twice and refilled.

    This morning, according to my TF100 kit, I am at 45 CYA. Super excited that I was able to get it under control despite the fact that I wasn't sure it was possible.

    So if you have been wondering if you can get your high CYA levels under control, you can. Go for it.

    Now if I can just get my Stenner pump here, I can set up on an automated bleach system and try to maintain. Also, an FYI, if you order your pump from Water Treatment Supply don't throw away your measuring cups. It has been 9 days, and I still have yet to get the pump.
    14,800 gallons in-ground vinyl. sand filter. 1.5 hp pump

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    Mod Squad tim5055's Avatar
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    Re: Lowered my CYA from 200 to 45

    P
    Quote Originally Posted by squib View Post
    Bought a house with a pool last year and started trying to figure out how to keep the chemicals balanced. Took water in for testing and everywhere in town told me that CYA levels were part of some witchcraft science and to never worry about it.

    Now if I can just get my Stenner pump here, I can set up on an automated bleach system and try to maintain. Also, an FYI, if you order your pump from Water Treatment Supply don't throw away your measuring cups. It has been 9 days, and I still have yet to get the pump.
    admitting the CYA/FC relationship cuts into pool store sales of chemicals.

    Good luck,with your Stenner - mine has been wonderful!
    TFP Moderator 39 X 18 23,000(ish) freeform gunite; built 2007ish; Pentair Triton II TR100 600lb Sand filter; 2 HP Pentair pump with 2.2 HP AO Smith single speed motor; 2 skimmers, 1 main drain, 4 returns w/waterfall, Stenner 45MHP2 3GPD running@ 60% - 15 gal Tank; heated by the sun CYA 200+ when I started - 50 now. Dolphin Supreme M5 Pool Cleaner. Hot Springs SX Spa, 285 gallon

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    Mod Squad pooldv's Avatar
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    Re: Lowered my CYA from 200 to 45

    Wow! Witchcraft, that's a first. LOL! I guess they are trying to scare you into buying their stuff. Boo! Oops, didn't work.

    Congrats on having a normal CYA level and a great plan to keep it that way.
    TFP Moderator
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    2012 build and pics, 20k gal gunite, black onyx pebblesheen, OK flagstone, IntellifoVS, cart filter w/Pleatco, IC40 SWG, Solartouch, 5 12'x4' solar panels, HP50HA heat pump, 8mil solar cover, borates, TF-100 test kit, SONOS, Doheny's Discovery Robot, hot tub on bleach

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    Patrick_B's Avatar
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    Re: Lowered my CYA from 200 to 45

    Quote Originally Posted by squib View Post
    Bought a house with a pool last year and started trying to figure out how to keep the chemicals balanced. Took water in for testing and everywhere in town told me that CYA levels were part of some witchcraft science and to never worry about it.

    Started following this site and decided to get pool in shape for this summer. Every time I vacuumed, I set the valve to waste and replaced about a foot of water 10 times. Then over the last two weeks, I have drained the pool to 50% twice and refilled.

    This morning, according to my TF100 kit, I am at 45 CYA. Super excited that I was able to get it under control despite the fact that I wasn't sure it was possible.

    So if you have been wondering if you can get your high CYA levels under control, you can. Go for it.

    Now if I can just get my Stenner pump here, I can set up on an automated bleach system and try to maintain. Also, an FYI, if you order your pump from Water Treatment Supply don't throw away your measuring cups. It has been 9 days, and I still have yet to get the pump.
    I cannot say enough how good this is to hear. GREAT job taking the bull by the horns. Nothing like feeling for yourself that knowledge is power. Awesome!!
    TFP Moderator
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