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Thread: Multiple issues with pool water and chemistry

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    Join Date
    Sep 2016
    Location
    Bloomington, IN
    Posts
    17

    Multiple issues with pool water and chemistry

    Hello all - I've looked at TFP periodically for a few years but this is my first post. As you can see from my signature we have a lap pool in a pool house attached to our home. I've battled stains on the fiberglass pool and seem to be doing well with Metal Magic. The pool is 85 degrees, CH 200, TA 110, pH 7.5, FC 5 which seems pretty spot on for what Hayward wants for the heater. The heater was installed last fall. Something was going on with the combustion and the heat exchanger sooted over, causing it to overheat and the plastic side panel to melt. Our local person consulted with Hayward and changed some things and it seemed to work well for a while, then sooted over again and the side melted. The regional Hayward technician is now involved. When he was here he noted significant lime deposits in the heat exchanger and questioned me about the pool chemistry. I emailed him the test results above. I'm wondering about the pool chemistry because of the heat exchanger findings, but also note that when I add chlorine to the pool it clouds up. Sorry to throw a kitchen sink full of problems as my first post but thought maybe someone here would have some insight. Of course we will let Hayward do its own analysis of problems. I should confess that I was adding liquid chlorine slowly through the skimmer with the pump running and so that may have caused the scaling...

    Thanks for any and all suggestions.
    8' x 4.5' x 75' fiberglass in-ground, indoor pool (installed 1991) with Coverstar automatic cover
    Hayward 250 heater, sand filter
    Hayward .75 HP pump
    Typically use liquid chlorine for sanitizing, Taylor k-2006 test kit

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    Mod Squad pooldv's Avatar
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    Aug 2012
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    DFW, TX
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    Re: Multiple issues with pool water and chemistry

    Welcome to TFP!

    Those numbers don't indicate scaling. High TA, 120+ and high pH, over 7.8 are what contribute to scale. Bleach wouldn't cause scaling. Adding muriatic acid into skimmer could contribute to scaling in the heater.

    More about scale here, Pool School - Calcium Scaling
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    Join Date
    Sep 2016
    Location
    Bloomington, IN
    Posts
    17

    Re: Multiple issues with pool water and chemistry

    Thanks for your response. I've started a new thread in the "everything else" section about calcium deposits.
    8' x 4.5' x 75' fiberglass in-ground, indoor pool (installed 1991) with Coverstar automatic cover
    Hayward 250 heater, sand filter
    Hayward .75 HP pump
    Typically use liquid chlorine for sanitizing, Taylor k-2006 test kit

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