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Thread: Can't get total alkalinity right

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    Join Date
    Jul 2014
    Location
    Naalehu/Hawaii
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    3

    Can't get total alkalinity right

    Our pool was just completed two weeks ago. We have dark gray, nearly black plaster in hopes it will draw the sun and warm the water slightly. We test the water daily and following the test kit guidelines we've added a pint of acid plus 8-10 pounds of Total Alkalinity every day. This is confusing and it seems like the chemicals would be working against each other. Does this sound normal? The gentleman who built our pool said because of our water we only need to be concerned with chlorine, acid and total alkalinity. Does that make sense? We both had pools as children but seem to have forgotten some things. We are reading pool school but hoped to get an answer yo this specific question right away.
    Keith & Cyndy Chambers-Naalehu, Hawaii-IG black plaster built 7/2014-12,000 gallon 12'X30'-Guardex 4 in 1 test kit-Pentair 1/2 horse 1 speed pump-Pentair 200!sq ft cartridge filter

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    svenpup's Avatar
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    Nov 2009
    Location
    Sacramento, CA
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    835

    Re: Can't get total alkalinity right

    What actual product are you adding for TA? Sounds insane to me. Assuming it's Sodium bicarbonate (baking soda) every 10 lbs would add 35 to 20000 gallon pool (you didn't specify pool size or anything else for that matter). How many days have you done this? Edit: I see 12000 gallons in your sig...that's 60 TA your adding with every 10 lbs.

    We promote knowledge based pool care. This means adding only what is necessary based on testing with a reliable test kit (TF-100) and always understanding the effects of what we add.

    TA is one of those parameters that is easy to raise and difficult to lower. You may be getting yourself into a situation where you are constantly fighting rising pH caused by sky high TA.

    What are you currently using for testing? Can you post a full set of results (FC, CC, TA, pH, CYA, CH)?

    I recommend reading through pool school and getting the recommended test kit to start down the path of taking control of your new pool.
    TFP Method Advanced Intermediate
    • 17,500 gallons - In Ground - Plaster - Hayward Swimclear 3020 Cartridge Filter - Sta-Rite Max-E-Glas Main Pump upgraded with A.O. Smith B2980 E-Plus New Centurion Two-Speed Motor - Polaris 280 Cleaner with Polaris PB4-60 Booster Pump - TightWatt2 Timer - Taylor K-2006 Test Kit - Pool Pilot Digital Nano SWCG

    Helpful Links: Pool School, BBB for Beginners, How to Shock (hint...it's a process not a product), Chlorine/CYA Chart, Jason's Pool Calculator

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    duraleigh's Avatar
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    Apr 2007
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    Sebring, Florida
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    30,077

    Re: Can't get total alkalinity right

    We test the water daily and following the test kit guidelines
    What test kit? can you copy the directions and post them up?
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

  4. Back To Top    #4

    Join Date
    Jul 2014
    Location
    Naalehu/Hawaii
    Posts
    3

    Re: Can't get total alkalinity right

    Okay, so hubby finally got our builders call back. Turns out his math was wrong and alkalinity is right on. Thanks for all the helpful info though. We have learned so much during the first day reading info on this site! Thank you so much! We will keep studying and check in when we need more info. I really appreciate how y'all treat everyone so respectfully when we feel like we didn't know what we were getting when we decided a pool would be so much fun and great exercise.
    Keith & Cyndy Chambers-Naalehu, Hawaii-IG black plaster built 7/2014-12,000 gallon 12'X30'-Guardex 4 in 1 test kit-Pentair 1/2 horse 1 speed pump-Pentair 200!sq ft cartridge filter

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    wjr75's Avatar
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    Jun 2013
    Location
    IL
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    816

    Re: Can't get total alkalinity right

    We had a new pebble sheen finished put on this spring. I can tell you from my experience it eats a lot of muriatic acid the first month.The first week I was adding a half gallon every few days to keep the ph down at 7.2, with a TA at around 110. After two months now my TA is at 90 and I'm adding only an 1/8 of a gallon every few days. I've gone through 4.5 gallons of muriatic acid so far this year.
    Inground 22k gallon gunite 15x31 main pool, 15x7 wading pool/sunning deck, hot tub/with overflow (9' octagon with limestone top) & slide NSWG, Aqua Blue Pebble Sheen
    Filter dual cartridge Sta-rite 450sq/ft, TF-100 Test Kit
    Heater Raypak 2100 400k btu cupro-nickel exchanger
    Auto pool cover, Polaris 280 auto pool cleaner, Jandy AqualinkRS8 Remote Control System

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