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

Thread: Increasing CH

  1. Back To Top    #1

    Join Date
    Sep 2009
    Location
    Frederick County, MD
    Posts
    175

    Increasing CH

    OK, so I need to bump my CH up, and I am currently sitting at 110 or so.

    Pool calculator shows that I need 410 oz (25.62 lbs) of calcium chloride to get to 250.

    I have a bag of Dowflake Calcium Chloride (77-80%) in the garage that I used to melt ice in the driveway.

    Is this OK to use, and does it matter if it is a bit old (say a couple of years or so)?

    To put it in, just dump like I add salt, or is there a different method?
    Jim

    Southern Frederick County, MD - Leisure Moroccan 38 Fiberglass Pool - 19,800 gallons
    Pentair 1.5 hp 2 speed pump - Cartridge filter - Dolphin robot - TF-100 Test Kit - SWCG

  2. Back To Top    #2
    JasonLion's Avatar
    Join Date
    May 2007
    Location
    Silver Spring, MD
    Posts
    37,879

    Re: Increasing CH

    Dowflake is just fine. It is essentially pure calcium chloride dihydrate. Calcium chloride stores very well, it should be fine even after many years.

    The best way to add it is to distribute across the surface of the deep end and then brush the pool or run the pool cleaner. You can also pre-dissolve and pour that in front of a return jet with the pump running. If you do pre-dissolve, be aware that calcium chloride gets very hot when it is dissolved, so watch out and don't get burned.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
    Creator of PoolMath and Pool Calculator. Other handy links: Support this site, TF Test Kits, Pool School

  3. Back To Top    #3

    Join Date
    Sep 2009
    Location
    Frederick County, MD
    Posts
    175

    Re: Increasing CH

    Thanks Jason.

    I think I will go the dissolve and pour route at first. I am sure when I get more comfortable dumping "ice melt" into my pool, I will be less cautious. )

    I am sure I will get lots of looks from people when I tell them I use ice melt and bleach to keep the pool so sparkly.
    Jim

    Southern Frederick County, MD - Leisure Moroccan 38 Fiberglass Pool - 19,800 gallons
    Pentair 1.5 hp 2 speed pump - Cartridge filter - Dolphin robot - TF-100 Test Kit - SWCG

Posting Permissions

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