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Thread: Calcuim Hardness low after purchasing water softner

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    Calcuim Hardness low after purchasing water softner

    Hi!

    My calcium hardness is reading very low (100), the calcium hardness increaser that I purchased said that I need to add roughly 20 lbs to increase by 150 for my pool size (12,000 gal). Is this safe to do? I am a little apprehensive to put that much in at one time. Before we bought our new water softener the CH was always reading at acceptable levels (the plumber installed the softener in the garage so all water entering the pool is softened.)



    I have a t-100 test kit and here were my readings from todays test

    FC- 5
    CC-0
    TA-120 (Been lowering it over the last week from 170!)
    PH- 7.5
    CH- 100
    CYA- 40

    Thanks!

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    Texas Splash's Avatar
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    Re: Calcuim Hardness low after purchasing water softner

    Amber, your signature doesn't tell us ... do you have a plaster, fiberglass, or vinyl pool?

    - - - Updated - - -

    Also interesting ... when I had my softener installed in the garage, it softened everything EXCEPT for the outside water hose bibs. Part of that was to avoid damaging plants. Are you sure the outside hose bibs are soft water as well? You could always do a CH check on those separately.
    Pat (a.k.a. Texas Splash) ~ My Pool: Viking Fiberglass; 17,888 Gal; Waterway Supreme 2-sp/2-hp pump; Hayward Ctg filter; TF-100 w/ Speed Stir
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    Re: Calcuim Hardness low after purchasing water softner

    Hi! Sorry, we have a plaster pool

    I will test the fill water now. I assumed fill water was low because the test was reading so low.

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    Re: Calcuim Hardness low after purchasing water softner

    I just tested my fill water (the one that goes directly into the pool from the outside) and my reading was only 25...twice! That is cuckoo-bananas.

    With that being said, I for sure need to keep raising my calcium hardness right?

    How much of the calcium hardness increaser can I safely add each time?

    Thank you for all of the fabulous advice
    12,000 Gal, Plaster Pool. Built 1984. HAYWARD sand filter pump model S244S.

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    Mod Squad pooldv's Avatar
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    Re: Calcuim Hardness low after purchasing water softner

    Yes, you definitely need to raise it. That is the lowest CH ever. You can add enough to raise it to 250 ppm. Broadcast it on the surface of the pool with the pump running and brush the pool to circulate. It will dissolve quickly.
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    Texas Splash's Avatar
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    Re: Calcuim Hardness low after purchasing water softner

    How can we be in the same area and have such different water? Oh yeah, Edwards Aquifer I guess. Not me though. Well, it's good you know for sure. Adjust and have a great weekend.
    Pat (a.k.a. Texas Splash) ~ My Pool: Viking Fiberglass; 17,888 Gal; Waterway Supreme 2-sp/2-hp pump; Hayward Ctg filter; TF-100 w/ Speed Stir
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    Re: Calcuim Hardness low after purchasing water softner

    Yeah the test was very bizarre. I drop of the 12 regent and it turned blue. Crazy low CH. Thank you everyone!
    12,000 Gal, Plaster Pool. Built 1984. HAYWARD sand filter pump model S244S.

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    Isaac-1's Avatar
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    Re: Calcuim Hardness low after purchasing water softner

    You might want to see about adding a bypass connection for your water softener.
    Indoor 20x40 35,000 gallon vinyl pool with 1.5 HP 2 speed Jandy FloPro pump, Hayward EC75 Perflex DE filter, 11 4x12 Techno-Solis solar panels w/ Aquasolar controller, Aquabot Turbo T Robot Cleaner. Also LMI metering chlorine dispenser pump and HotSpring Jetsetter
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    Re: Calcuim Hardness low after purchasing water softner

    Our fill water has CH=75. It's not that big a deal - I added 30 pounds when I opened the pool a couple of weeks ago. The instructions said to divide the total dosage into thirds and wait at least 6 hours between additions, so I did that.

    I don't think you'll lose a lot during the season unless you have a lot of splash-out.
    23,000 gallons IG gunite, pebble (I think)
    Hayward SP2610X15 1.5 HP Pump, Hayward sand filter
    Mineral Springs SWCG (it's actually Hayward/Goldline), Hayward Goldline T-CELL-15
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    Re: Calcuim Hardness low after purchasing water softner

    BTW, the product I used was Clorox Calcium Hardness Increaser.
    23,000 gallons IG gunite, pebble (I think)
    Hayward SP2610X15 1.5 HP Pump, Hayward sand filter
    Mineral Springs SWCG (it's actually Hayward/Goldline), Hayward Goldline T-CELL-15
    Polaris pool cleaner (with booster pump)
    TF-100, SpeedStir, K-1766 Taylor Salt Test, Lamotte Borate test strips

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    Isaac-1's Avatar
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    Re: Calcuim Hardness low after purchasing water softner

    Wow that stuff is pricey, one of the local hardware store chains has 20 pound tubs for about $20
    Indoor 20x40 35,000 gallon vinyl pool with 1.5 HP 2 speed Jandy FloPro pump, Hayward EC75 Perflex DE filter, 11 4x12 Techno-Solis solar panels w/ Aquasolar controller, Aquabot Turbo T Robot Cleaner. Also LMI metering chlorine dispenser pump and HotSpring Jetsetter
    I use and endorse TFtestKits TF-100 from http://tftestkits.net
    ~Remember TFP counts on your donations to keep this site ad free~

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    Re: Calcuim Hardness low after purchasing water softner

    Quote Originally Posted by Isaac-1 View Post
    Wow that stuff is pricey, one of the local hardware store chains has 20 pound tubs for about $20
    They may have it even cheaper in China - but I don't live there either.

    And I prefer having stuff delivered to my door. It saves time.

    I am quite happy with the product I linked to above. I know that it works, and I expect the $72 I spent to last most of the season here.
    23,000 gallons IG gunite, pebble (I think)
    Hayward SP2610X15 1.5 HP Pump, Hayward sand filter
    Mineral Springs SWCG (it's actually Hayward/Goldline), Hayward Goldline T-CELL-15
    Polaris pool cleaner (with booster pump)
    TF-100, SpeedStir, K-1766 Taylor Salt Test, Lamotte Borate test strips

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