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Thread: High CYA, will reverse osmosis help vs drain and fill

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    High CYA, will reverse osmosis help vs drain and fill

    My pool has a CYA that's higher than 120 and I'm starting to see algae pop up in places due to low FC. I read the only way to reduce CYA level is to drain and replace some of the water. I am in San Diego and found a service on the net http://poolservicestech.com/ that claims to use reverse osmosis to clean the existing pool water and also claim it reduces the CYA levels. Does anyone have any experience with a service like this?

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    Mod Squad jblizzle's Avatar
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    Re: High CYA, will reverse osmosis help vs drain and fill

    Yes it will work, also reduces the CH. The RO seems to only be available in southern California and Arizona, so it does not get mentioned much. Also generally it is still cheaper to just replace the water.

    There are a few threads where before and after results were posted. If you do it, please report the results.
    Jason, TFP Moderator
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    linen's Avatar
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    Re: High CYA, will reverse osmosis help vs drain and fill

    Welcome to tfp, ymee

    As jbliz said it will reduce cya and most of the other dissolved solids in your pool including CH, TA, salt, borates etc.
    TFP Expert who uses Pool School and my TF100 test kit along with PoolMath for my: Round 11K gallon AGP with deep end, 20" sand filter, Matrix 1hp 2spd, 6 2ftX20ft solar panels (and solar cover!), Intex SWCG (copper bars disconnected) and a Rubadub hot tub (chlorine). The SLAM process is not finished until: 1. CC < 0.5 ppm, 2. An OCLT < 1.0 ppm and, 3. The water is crystal clear.

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    Mod Squad jblizzle's Avatar
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    Re: High CYA, will reverse osmosis help vs drain and fill

    FYI, I was just trying to compile a list of places where this was available yesterday and happen to know there is at least one other company in San Diego that does it, so certainly shop around.
    Jason, TFP Moderator
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    Pool School + Test Kit + PoolMath = A TROUBLE FREE POOL
    If you found TFP helpful and we saved you money ... Become a TFP Supporter!

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    Re: High CYA, will reverse osmosis help vs drain and fill

    cool..I will give them a call tomorrow to get an idea of cost. I was considering draining part of the pool but stumped as to where I would empty that much water...there don't seem to be any storm drains near where I live and draining it onto the street may cause my neighbors to get upset...dunno.

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