Become a TFP Supporter Pool Math Forum Rules Pool School
Results 1 to 3 of 3

Thread: CH levels

  1. Back To Top    #1

    Join Date
    Jun 2016
    Location
    Lemont, IL
    Posts
    6

    CH levels

    Just ran a full test
    FC - 1.5
    CC - 0
    PH - 7.8
    TA - 175
    CH - 500
    CYA - >30 still slowly bringing up
    Temp - 86
    CSI - .84

    Water is crystal clear, I will be adding liquid chlorine to bring FC up to 4. Adding acid to lower PH to 7.4. I'm concerned with the CH levels, we did have calcium scaling years ago in the old liner, so bad that the soft skin on your feet would bleed sometimes after being in the pool for a long time. That was before I found this site and switched to liquid chlorine only method with the new liner. Also getting algae coming out of pool ladder. I may need to pull it out and clean it really good. Also, is it worth getting the reagents for a salt test? I know it is not required for us as we are non swg but if it made the water feel better I'd be all for it.

    A family member went the the pool store and they sold her 3 bags 73% calcium hypochlorite, I told her powder shock would be ok since we need to bring cya up anyways, but not cal hypo. I'm assuming I do not want to use that as the CH is already high. With a PH of 7.4 CSI will be .44, at least below .6

    Still new at this and wanted to run it by the experts. Thanks for your input.
    28' Above Ground vinyl 20,000 gallons
    DE Hayward Filter - Filled with well water
    Taylor K-2006 with add ons

  2. Back To Top    #2
    JoyfulNoise's Avatar
    Join Date
    May 2015
    Location
    Tucson, AZ
    Posts
    11,592

    Re: CH levels

    You could better control your CSI and potential calcium scaling if you could lower your TA. 175ppm TA is very high and contributes directly to a very positive CSI. By contrast my pool has 850ppm CH and I have no problems keeping my CSI negative. My TA is at 50ppm and my pH almost never goes above 7.7-7.8.
    Matt
    16k IG PebbleTec pool, 650gal spa, spillway and waterfall, 3HP IntelliFlo VS / 1.5HP WhisperFlo, Pentair QuadDE-100 filter, IC40 SWCG, MasterTemp 400k BTU/hr NG heater, KreepyKrauly suction-side cleaner Dolphin S300i robot, EasyTouch controls, city water, K-1001, K-2006 and K-1766 test kits, Mannitol test for borates

  3. Back To Top    #3

    Join Date
    Jun 2016
    Location
    Lemont, IL
    Posts
    6

    Re: CH levels

    That makes sense. I've been working on lowering the TA. Add acid to bring PH to 7.2, then aerate and do it all over. I started at TA of 275 so I'm on the way.
    28' Above Ground vinyl 20,000 gallons
    DE Hayward Filter - Filled with well water
    Taylor K-2006 with add ons

Posting Permissions

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