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Thread: How HARD is too HARD? (No Viagra Jokes)

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    Squeeken's Avatar
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    Red face How HARD is too HARD? (No Viagra Jokes)

    We moved into our home three years ago. Our plaster pool's Calcium Hardness has been steadily increasing from 450 in AUG2012 to 525 in JUL2013 to 650 today. I am not having any problems with scaling except for around one piece of granite stone on the spa overflow which has been there for at least two years. It has not spread or gotten any worse. The pool looks great.

    My question is, how hard is too hard?
    My tap water has a CH of 200. Should I do a water change, or not worry about it since all seems well?

    My Test Results Today 04/17/2014 using Taylor K-2006C

    Water Temp: 72
    FC: 5.0
    CC: 0.0
    PH: 7.6
    TA: 60
    CH: 650
    CyA: 35
    Salt: 2700
    Balance: 0.2

    I know my CyA is low, but I wanted to get this question answered before I add the acid, in case I need to do the water change.
    Pool: 18000 gal w/ spill over spa Pump: 3HP Intelliflo VS 011018 Booster: 1.5HP Sta-Rite Dyna-Max Filter: 300 sqft Sta-Rite System 3 Heater: Rheem RayPak 399 BTUH Chlorinator: AutoPilot Pool Pilot Digital Controller: Jandy iAquaLink RS PS8 PDA Cleaner: Pentair Pool Shark Plumbing: 2"

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    Richard320's Avatar
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    Re: How HARD is too HARD? (No Viagra Jokes)

    You should be able to maintain a neutral CSI without much problem until CH gets to about 800. I've been doing it for a few years.

    If you got those results the old fashioned way, they may be reading high. My CH dropped a lot just by testing it using the speedstir.
    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!

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    Squeeken's Avatar
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    Re: How HARD is too HARD? (No Viagra Jokes)

    Thanks Richard. I'm not sure what the old fashion way is, but I do use the Taylor speedstir.
    Pool: 18000 gal w/ spill over spa Pump: 3HP Intelliflo VS 011018 Booster: 1.5HP Sta-Rite Dyna-Max Filter: 300 sqft Sta-Rite System 3 Heater: Rheem RayPak 399 BTUH Chlorinator: AutoPilot Pool Pilot Digital Controller: Jandy iAquaLink RS PS8 PDA Cleaner: Pentair Pool Shark Plumbing: 2"

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    Richard320's Avatar
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    Re: How HARD is too HARD? (No Viagra Jokes)

    Quote Originally Posted by Squeeken View Post
    Thanks Richard. I'm not sure what the old fashion way is, but I do use the Taylor speedstir.
    Swirling by wrist action. Your arm would be exhausted.
    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!

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    Mod Squad JVTrain's Avatar
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    Re: How HARD is too HARD? (No Viagra Jokes)

    Quote Originally Posted by Richard320 View Post
    Swirling by wrist action. Your arm would be exhausted.
    In combination with thread title... comic gold.

    Joel - TFP Moderator - Minnesota - **Become a TFP Supporter!** Helpful Links: ABCs of Pool Water Chemistry - SLAM Procedure - Chlorine/CYA Chart
    40x20 Pool: 32K Gallons * Vinyl * Bleach Chlorination * Hayward S270T Sand Filter * Pentair SuperFlo 1 HP * Teledyne/Laars Heater * AquaVac Tigershark * TF-100 w/ SpeedStir
    Isolated Spa - 345 Gallons

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    Divin Dave's Avatar
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    Re: How HARD is too HARD? (No Viagra Jokes)

    LOL
    Quote Originally Posted by JVTrain View Post
    In combination with thread title... comic gold.

    Sent from my SCH-I545 using Tapatalk
    Divin Dave,
    IG Vinyl, 15' x 30', 3 1/2' - 6' deep, Oval, ~15K gal, Intelliclor IC40, Intelliflo VS pump, Clean and Clear 420 Filter, auto-fill-disabled, Retrofit LED Color Light, Dolphin Nautilus Robot, TF100 Test Kit, Taylor K1766 Salt Test Kit, Tftestkit Pressure Gauge.
    www.tftestkits.net Experience- it's what's learned just after you needed it most !!

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    Re: How HARD is too HARD? (No Viagra Jokes)

    Gradually, your CH will likely continue to climb. Maintain your pH in the lower 7's and your TA where it is and as Richard 320 says, you should be fine.

    At some point, I would suggest around a 50% replacement of your water to drop CH where it will be more manageable.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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    Re: How HARD is too HARD? (No Viagra Jokes)

    My CH was 720 and I just tried to keep my pH at 7.2 to keep my CSI in the normal range. Off the top of my head I believe "normal" is between -.6 and .6 and as long as you fall with those numbers, calcium scale shouldn't be a problem.
    17,000 inground gunite pool finished June 2013. Pentair variable speed something or another. Polaris cleaner, inline rainbow chlorinator. Using trichlor until CYA reaches 50-60.

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