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Thread: Rising CH and scaling? Help!

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    Join Date
    May 2010
    Location
    Dallas, TX
    Posts
    227

    Rising CH and scaling? Help!

    My CH was too high about a month ago so i backwashed to waste before a big rain and a little after to lower it. got t back around 350. now it is back to 460, and i haven't added and hardness. i did just add MA and bleach

    Just finished test results
    FC - 8
    CC-0
    PH 7.2
    TC-8
    TA - 45 (out of baking soda) usually stays pretty solid at 70
    CH - 460
    CYA - 50
    Borates - 40

    Any idea where it is coming from? Fill water is a Ch of 6.

    Also seem to have a scaling issue maybe? PH was too high, and due to family illness i have been in and out of town alot more than expected and havent been able to keep up with it as much as i would like. Replastered march 2011. below pictures are kinda hard to see with the reflection but it looks like a grayish tone running down the sides. don't have a pic of it, but there is also large build up of white material under the rock overflow of the hottub





    new house: TBDK gal IG plaster pool, filter Titan CM DE filter 36 sq ft , 1.5 HP Pump; Polaris 380

  2. Back To Top    #2
    Richard320's Avatar
    Join Date
    Jan 2010
    Location
    San Dimas, CA (LA County)
    Posts
    18,768

    Re: Rising CH and scaling? Help!

    Welcome to the club.

    What's your pH? That's the critical measurement. Aim low, like 7.4. I keep my pH 7.5 or below, TA is usually around 50, sometimes 60 after a fillup, and my scale is slowly melting away despite CH of 800 right now.

    I water my lawn with pool water then refill. Each time, I lose about 3% CH, so it's not the most efficient method, but it doesn't waste any water.
    16K freeform gunite with spa; Pentair 4000 DE filter; Century Whisperflow 1 HP; Pentair Minimax heater.
    Troublefree does not mean Maintenancefree. It's like brushing your teeth: You can spend a couple minutes a day and pennies a week or go to the dentist once a year and spend several thousand dollars.
    A pool is like a pet - you have to feed it every day, even the days you don't want to play with it!

  3. Back To Top    #3

    Join Date
    May 2010
    Location
    Dallas, TX
    Posts
    227

    Rising CH and scaling? Help!

    Sorry PH is 7.2 right now. Usually try to keep it around 7.5, but reading it should be a little lower.

    So I'm for 7.4 an keep TA a little lower than normal around 50 and it should slowly correct itself? So maybe refill once or twice a week maintain all levels at the "new standard" is the way to go?
    new house: TBDK gal IG plaster pool, filter Titan CM DE filter 36 sq ft , 1.5 HP Pump; Polaris 380

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