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Thread: Slam ph question

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    Slam ph question

    I am just starting my first slam. Ph before start was 7.6. I added a little more liquid chlorine than calculation suggested (pool shop said CC was 1.1, calc was about 6litres i did 8). Now ph is 8.5, my auto chem. unit is slowly bring it down by dripping in acid. Question: do I even want to reduce ph? Should I just unplug the acid feed and leave filter on and leave ph where it is? Or should I manually dose required acid to drop ph 7.6?
    15.8k gallons (60t litres), IG pebble-crete, Astral CTX360 pump 1.25hp, Astral RC9 chemical tester (ORP and ph), Chlorine/acid dripper, Sand Filter, Polaris 3900 pool clearer (own pump), Dec2011 completed, location: Sydney-Australia

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    Mod Squad JohnT's Avatar
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    Re: Slam ph question

    Welcome to TFP!

    pH testing will be inaccurate while your chlorine level is high. I wouldn't adjust it until you are back to normal chlorine levels.
    TFP Moderator
    20K Gallon 20X36 Vinyl Inground
    Hayward S244T Sand Filter with 1HP Whisperflo Pump. Liquidator C-201 and Solar Heat

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    Re: Slam ph question

    +1 what JohnT said.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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    Re: Slam ph question

    thanks guys. slam was successful. spent some time understanding pool chemistry last few days, particularly following some really poor advice from pool shops.
    15.8k gallons (60t litres), IG pebble-crete, Astral CTX360 pump 1.25hp, Astral RC9 chemical tester (ORP and ph), Chlorine/acid dripper, Sand Filter, Polaris 3900 pool clearer (own pump), Dec2011 completed, location: Sydney-Australia

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