Become a TFP Supporter Pool Math Forum Rules Pool School
Results 1 to 2 of 2

Thread: High Calcium

  1. Back To Top    #1

    High Calcium

    Split from readings-with-tftestkit-t11064.html Butterfly

    Thanks for the instruction on the CH test. I've owned the pool for about 2 years now and the Ph has always been high. It seems like i'm always putting a lot of acid in every week to keep it down!I tried the pool schools tc reduction about a week ago but i guess it didn't work. Should i try it again? Also how do u reduce the CH? The water here has a lot of calcium What do you do?
    15000 ga irregular shape pool with spa
    pantair intelliflo 4speed variable pump
    pentair ic 40 swg
    pentair quad de filter

  2. Back To Top    #2

    Join Date
    Mar 2007
    San Rafael, CA USA

    Re: readings with tftestkit


    Based on this post you have the TA down to 85 ppm. Given your higher CH you can try a lower TA of 70 ppm and should also raise your CYA to 70-80 ppm which should let you turn down your IC 40 saltwater chlorine generator (SWG), though your target FC will be a minimum of 4 ppm. That should reduce the rate of your pH rise (and you'd have a pH target of around 7.7). After you do all of that, then you can also consider adding 50 ppm Borates to the pool, but start with the lower TA and higher CYA and see how things go.

    You've been having your water tested at Leslie's and I don't trust their readings. Given the amount of white flakes you were seeing, even with your original numbers, I suspect that your CH might be even higher than 400 ppm or your TA higher than 85. It would be good if you got your own good test kit such as the TF100 at here so you can know what's really going on with your water.

    16,000 gallon outdoor in-ground 16'x32' plaster pool; Pentair Intelliflo VF pump; Pentair IntelliTouch i9+3s control system; Jandy CL-340 square foot cartridge filter
    12 Fafco solar panels; Purex Triton PowerMax 250 natural gas heater (200,000 BTU/hr output); automatic electric pool safety cover; 4-wheel pressure-side "The Pool Cleaner"

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts