Become a TFP Supporter Pool Math Forum Rules Pool School
Results 1 to 4 of 4

Thread: High CYA, CH, and Metal

  1. Back To Top    #1

    Join Date
    Jul 2013
    Location
    Dallas, TX
    Posts
    12

    High CYA, CH, and Metal

    I recently bought a house with a 12,000 gal pool and have been studying this site to learn how to take care of it. I just got a Taylor test kit to check the water. The issues I need to address are high CYA ( approx 200 ), high CH ( approx 700 ), and high metal content ( heavy stains on steps and light stains on walls that clear up with vitamin C ). My plans are to drain and refill between 50% and 75% of the water to bring down the CYA and CH, and treat the metal stains with ascorbic acid and sequestering agent.

    I need advice on where to start. My initial thought was to deal with the metal stains first so all the metal will be sequestered in the water before draining. However, my tap water's PH is over 8.0 and I am concerned that the stains will come back as soon as I refill and require a second treatment.

    What do you think? Drain first, ascorbic acid first, or something complete different? Thanks.
    17K gallon IG Plaster. 48sqft Hayward DE filter. Stenner Pump

  2. Back To Top    #2
    Mod Squad Bama Rambler's Avatar
    Join Date
    Jun 2009
    Location
    SouthWest Alabama
    Posts
    22,347

    Re: High CYA, CH, and Metal

    I would treat the stains first and then drain the water. That way you'll get a lot more of the metals out of the water permanently. You will lose some sequestrant, but dumping all the metals you can would be worth it to me.
    Dave J. TFP Moderator
    24' x 52" Round AGP. 2hp/¼hp SPL Power-Flo 2-speed pump. 200sqft Waterway Cartridge Filter. 45MHP2(3GPD) Stenner Peristaltic Pump
    Pool School ----- Pool Math ----- TF-Test Kit

  3. Back To Top    #3

    In the Industry

    duraleigh's Avatar
    Join Date
    Apr 2007
    Location
    Sebring, Florida
    Posts
    30,085

    Re: High CYA, CH, and Metal

    jp12,

    Welcome to the forum. You are off to a good start. You understand your issues and know what to do about it. Bama's sequence makes great sense to me and I don't think I would have thought to do it like that.

    He is a smart guy but please don't tell him.........he'll get a "swell head" and quit helping dummies like me.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

  4. Back To Top    #4

    Join Date
    Jul 2013
    Location
    Dallas, TX
    Posts
    12

    Re: High CYA, CH, and Metal

    Thanks Guys. I will give it a shot next week and let you know how it goes.
    17K gallon IG Plaster. 48sqft Hayward DE filter. Stenner Pump

Posting Permissions

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