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Thread: Readings are a mess after rains

  1. Back To Top    #1

    Join Date
    Jun 2014

    Readings are a mess after rains

    I've had a ton of rain here in Ks the last few days/this morning. I'm using a TF 100 test kit. Here's what I have
    PH 7.2
    CH 125
    TA 60
    CYA 80
    FC 25
    CC 0

    I have been fighting a green algae issue along my sides/ bottom since before the 4th. Its still clear. Ive added numerous bottles of bleach, but with dodging the downpours, its been challenging. My FC was 30 last night before the last round of rain. I know everything is off besides ph. My water is above the skimmer, and intend on draining it down some this after afternoon and refilling to normal level. Hopefully that will help my cya to lower as well. I'm at a loss as to where to start. I read on this sight before to go by lowest letter, but want to clarify that and how to start. Thanks for your help once again, love this site and all the kind people.
    16x32, IG, S-200 Sand Filter, 3/4 hp pump

  2. Back To Top    #2
    Patrick_B's Avatar
    Join Date
    Jun 2011
    Midland TX

    Re: Readings are a mess after rains

    Hey there and welcome if I haven't said so.

    I would suggest getting the Cya down to 30-40 and doing a SLAM procedure on the pool. That would mean replacing about half your pool right now with draining/refill, but a SLAM at 80 Cya will take an enormous amount of Chlorine.
    TFP Moderator
    Essential Links:
    ABC's Of Pool Chemistry, Test Kits, SLAM Your Pool
    28K Gal IG FreeForm, CLI Quartz, Pentair 36"SF & VS Pump, Dolphin M5, Rheem

  3. Back To Top    #3
    DaninFLA's Avatar
    Join Date
    Apr 2015
    Sarasota, FL

    Re: Readings are a mess after rains

    the rain isn't lowering your FC, the algae is. rain has zero effect on FC loss, only thing it can do is slightly dilute your water.
    9,000 gallon in-ground Saltwater pool, plaster, cartridge filer, 1.0 hp pump, Hayward T-15 SWCG, TF-100
    Pool School - Chlorine / CYA Chart; Pool School - Test Kits Compared;

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