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Thread: CYA Level - Logic for SWG Pools

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    CYA Level - Logic for SWG Pools

    Why are the CYA levels for SWG pools recommended to be higher?

    http://www.troublefreepool.com/conte...art-slam-shock

    Non-SWG goes down to 20, SWG starts at 60.

    I'm at ~35 and deciding whether to increase that further or not.
    ~26,000 gal (still dialing it in) / in-ground saltwater (Hayward T-CELL-15) / Blue Granite PebbleSheen / 2hp WhisperFlo pumps (main), 1.5hp WhisperFlo pump (waterfall) / Pentair DE filter / AquaLogic control / Polaris cleaner aka "Trackie" / Dallas, TX

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    Re: CYA Level - Logic for SWG Pools

    One of the main benefits is that the SWG will last longer. Try typing that question in the search function and you will find lots responses to this question.
    16k gal plaster with raised spa, Jandy DEV60 filter, 2 HP 2-speed SHPF Jandy Stealth pump
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    Mod Squad jblizzle's Avatar
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    Re: CYA Level - Logic for SWG Pools

    Basically, the SWG adds FC very slowly and thus needs more protection from the sun to maintain adequate FC levels. This in turn allows the SWG to not have to generate as much FC and prolongs its life.
    Jason, TFP Moderator
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    JasonLion's Avatar
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    Re: CYA Level - Logic for SWG Pools

    CYA levels are a balancing act between lower chlorine usage at higher CYA levels vs more trouble fighting algae at high CYA levels. A SWG significantly changes the odds of getting algae, lowering them noticeably. The SWG also makes using more chlorine rather more expensive. So the tradeoff comes out in a different place.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
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    Re: CYA Level - Logic for SWG Pools

    Also, use of the SWCG tends to have the pH rise so being able to lower its output by losing less chlorine to sunlight due to the higher CYA helps to reduce the rate of such pH rise.
    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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    Re: CYA Level - Logic for SWG Pools

    Thanks all I'm at 60 now

    ~26,000 gal (still dialing it in) / in-ground saltwater (Hayward T-CELL-15) / Blue Granite PebbleSheen / 2hp WhisperFlo pumps (main), 1.5hp WhisperFlo pump (waterfall) / Pentair DE filter / AquaLogic control / Polaris cleaner aka "Trackie" / Dallas, TX

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    Re: CYA Level - Logic for SWG Pools

    Higher cya shields chlorine from the sun. Protective effect. Would be hard to maintain such a high sustained level of FC without a swg.
    15 K gal/gunnite, 600 gal attached SPA, Hayward: ProLogic, ColorLogic LED, Super II pumps, 400k BTU heater, StarClear cartridge filter for, SwimClear cartridge filter . Pentaire: booster

    http://www.troublefreepool.com/detai...l?hilit=corpus

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