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Thread: How much Borax to raise pH?

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  1. #1
    mas985's Avatar
    mas985 is offline Lifetime Member Whizbang Spinner mas985 3 stars mas985 3 stars mas985 3 stars
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    Default Re: How much Borax to raise pH?

    Check out my tap water:

    City numbers
    TA 225-276
    CH 280-354
    PH 7.9-8.0

    Add a SWG and plaster pool, it is no wonder I use 1/2 gallon of acid a week.
    Mark
    Hydraulics 101; Pump Ed 101; Pump/Pool Spreadsheets; Pump Run Time Study; DIY Acid Dosing; DIY Cover Roller
    18'x36' 20k plaster, MaxFlo SP2303VSP, Aqualogic PS8 SWCG, 420 sq-ft Cartridge, Solar, 6 jet spa, 1 HP jet pump, 400k BTU NG Heater

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    chem geek is offline PF Supporter Whibble Konker chem geek 4 stars chem geek 4 stars chem geek 4 stars chem geek 4 stars
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    Default Re: How much Borax to raise pH?

    Wow, your water is very, very hard. You can try aerating your water (in a bucket or large tub) before adding it to your pool for refill since that will lower the TA. If you do that, you can add acid to it first which will lower the pH to make it easier to lower the TA (i.e. lower the pH and aerate according to Ben's alkalinity lowering procedure). Of course, if you just put in fill water through an automatic floater (similar to a toilet tank), then there's not much you can do except constantly fight the pH rise by adding acid.

    The more troublesome quantity is the calcium since that will just keep getting added to your pool more and more. Eventually, you'll have to drain and refill substantial amounts of your pool water to get that down. Sorry you have such a difficult situation.

    Richard

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    mas985's Avatar
    mas985 is offline Lifetime Member Whizbang Spinner mas985 3 stars mas985 3 stars mas985 3 stars
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    Default Re: How much Borax to raise pH?

    TA really has not been the issue since I need to lower PH so much. It pretty much stays 100-120 ppm. CH on the otherhand is a battle. Next winter I will do a refill when the city uses more surface water than well water and see if I cannot start out the season at 200 ppm. It does make me wish I had chosen a fiberglass pool though.
    Mark
    Hydraulics 101; Pump Ed 101; Pump/Pool Spreadsheets; Pump Run Time Study; DIY Acid Dosing; DIY Cover Roller
    18'x36' 20k plaster, MaxFlo SP2303VSP, Aqualogic PS8 SWCG, 420 sq-ft Cartridge, Solar, 6 jet spa, 1 HP jet pump, 400k BTU NG Heater

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    Default Re: How much Borax to raise pH?

    Well it worked - this morning PH is 7.5 and TA is 90.
    Completed 8/21/06
    14,000 gallon 3'-6' concrete pool with Diamond Brite
    Spa with spillway
    250K BTU gas heater (for spa)
    SWCG - Aqua Rite
    Hayward Super II Pump - Cartridge filter

    See pictures here http://www.philsimmons.com/family/ga...mages&keyword=

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