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Thread: Clear opening do I slam?

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    Join Date
    Sep 2015

    Clear opening do I slam?

    Opening after the winter in KY. Water was clear this year! My PH is 7.4 FC was 1.5 CC 0 cya was 50 alk was 50. I am adding cya and added chlorine based on the calc to bring my FC up to 5. Do I need to slam at opening? Or only if I have CC?
    12K, 14x28 rectangle vinyl in gound, Pentair superflo pump, Pentair C&C RP cart filter, Aquarite SWG

  2. Back To Top    #2
    Mod Squad JVTrain's Avatar
    Join Date
    Feb 2014
    Central Minnesota

    Re: Clear opening do I slam?

    What I do every year when I open is bring the FC up to shock level, then check the FC and CC 30 minutes later (usually in the evening). If I see CC at 1 or above, I'll do an OCLT. Otherwise, I'll just let the FC drop back to normal levels and go into maintenance mode.

    With your water being clear, no CC and some FC remaining, you could likely just go right into maintenance mode. Especially since your CYA looks good still too.
    Joel - TFP Moderator - Minnesota - **Become a TFP Supporter!** Helpful Links: ABCs of Pool Water Chemistry - SLAM Procedure - Chlorine/CYA Chart
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