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View Poll Results: How many gallons per week?

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    1 3.33%
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Thread: How much acid in a week

  1. Back To Top    #1

    Join Date
    Jul 2007
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    How much acid in a week

    How much acid in a week's time are most of you SWG'ers using? Just trying to get an overall average of the site SWG'ers. If you know better by the month what you go through, then just divide it out on a weekly basis.

    Usually I'll wait every other weekend, throw 2 or 3 gallons in, due to the SWG, spa spillover and rock waterfall....

    edit: guess size of the pool would have a direct effect on this as well... so you might mention that if you post.
    My Pool - 18x24 fully setup Cabana, 22x48 gunite/quartz plaster (3-5-3 depth) & 8' spa w/ spill and 5' natural rock waterfall; Hayward DE filter/pumps/heater; Hayward Pro Logic controller; Phantom cleaner. Finished 06/01/07.

    RedishConstruction.com

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  3. Back To Top    #3
    JasonLion's Avatar
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    That is quite a bit of acid. What TA level are you at? You can often reduce the amount of acid you need to use by lowering your TA.
    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

  4. Back To Top    #4
    Guest
    I use about 6 oz or so about every 2 months. Then again I have a fiberglass pool and 50 ppm borates and a TA of 60 ppm.
    Even with the deck jets, spillover, and wateralls/bubblers my pH stays right at 7.6-7.7. I wait until it hits 7.8 to add acid. Even then it stays at 7.8 for quite a while. 8)
    ( I voted 0 gallons a week because my acid usage is very low.)
    (I really had to restrain myself about making any jokes about the '60s! )

  5. Back To Top    #5
    DaveNJ's Avatar
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    May 2007
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    I run a constant 16oz a week.
    IG 18x36 oval vinyl, Spill over spa, Northstar 2hp-2spd, 2.5" piping, S310T 500lb Sand filter, 400k gas heater, AutoPilot SWCG
    http://www.tftestkits.net/

  6. Back To Top    #6

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    I get 3 different answers on test results on 3 different testers.

    ColorQ Tester:
    FC: Hi
    PH: 7.8
    TA: 107
    CH: 149
    CYA: 9

    HTH Tester:
    CC: 9
    PH: 7.2
    TA: 150
    CH: 140
    CYA: 55

    AquaChek Strip:
    FC: 9 (give or take)
    CC: 10(give or take)
    PH: 8
    TA: 140
    TH: in the 250 - 500 range, closer to the 500 by appearance

    It appears that I have to deal with the alkalinity some. I don't have a lot of trust in the ColorQ really, so I end up pulling numbers from it then retesting with another to get an average or second opinion. As we all know, strips aren't the most reliable nor easiest to get real accurate with, so I just use that for my own humor and see where it falls. Also, I'm purposely keeping the chl levels a little high right now to maintain and this weekend i'm going to turn it down some and start leveling it off where I want it. Pool is crystal clear.
    My Pool - 18x24 fully setup Cabana, 22x48 gunite/quartz plaster (3-5-3 depth) & 8' spa w/ spill and 5' natural rock waterfall; Hayward DE filter/pumps/heater; Hayward Pro Logic controller; Phantom cleaner. Finished 06/01/07.

    RedishConstruction.com

  7. Back To Top    #7
    iggy's Avatar
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    Re: How much acid in a week

    I use about 8 oz a week since January since the pool was completed.
    The sun and temp has been high and hot and I have my SWG panel set at 40% which maintains 2 to 3 ppm.
    We have reached the 80's and lots of sunshrine now.
    When summer comes I'm sure I would be up to a gallon a month.

    FC 3
    Ph 7.6
    Alk 110 - 120
    CA 250
    CYA 80

    I'm good
    In-Ground SWG pool 11,000 gal., Jandy CL460 Filter, 1.5hp Stealth Jandy pump, Paramount PV3 In-Floor cleaning sys., Goldline SWG, Hayward Color Logic 2.5 LED Light

  8. Back To Top    #8

    Join Date
    Mar 2007
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    Quote Originally Posted by sredish
    It appears that I have to deal with the alkalinity some.
    Your CYA might also be low -- the test results were inconsistent. With an SWG, a higher CYA of 60-80 ppm can lower chlorine loss from sunlight (even at a higher FC level for the CYA level) and allow you to lower the SWG output and that will lower the rate of pH rise. The combination of a lower TA and higher CYA usually helps out a lot. Using Borates is a third thing that can be done after the first two. Also, your pool isn't that old so there may still be some curing of the plaster going on, though that should be slowing down by now.

    Richard
    16,000 gallon outdoor in-ground 16'x32' plaster pool; Pentair Intelliflo VF pump; Pentair IntelliTouch i9+3s control system; Jandy CL-340 square foot cartridge filter
    12 Fafco solar panels; Purex Triton PowerMax 250 natural gas heater (200,000 BTU/hr output); automatic electric pool safety cover; 4-wheel pressure-side "The Pool Cleaner"

  9. Back To Top    #9

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    thanks Richard.

    I was going to get to work tomorrow on getting the CYA up to 80. Going away for a few days on Sat so I wanted to get the sock in beforehand. Also, I'm going to shoot for an 80/80 result. 80 on the CYA and 80 on the TA. Guess quickest way is to lower the ph more for the TA and then add in the stabilizer. I'll go ahead and lower the ph while I'm gone and turn on the waterfall as well.

    I'll do some searching on borates. I may go forward with that later.
    My Pool - 18x24 fully setup Cabana, 22x48 gunite/quartz plaster (3-5-3 depth) & 8' spa w/ spill and 5' natural rock waterfall; Hayward DE filter/pumps/heater; Hayward Pro Logic controller; Phantom cleaner. Finished 06/01/07.

    RedishConstruction.com

  10. Back To Top    #10

    Join Date
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    North of Dallas
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    also on the colorQ, I forgot about the cold water. it's said that the water temp needs to be roughly 80* for an accurate measurement on the cya and it's quite a bit colder.... so my bad on that.
    My Pool - 18x24 fully setup Cabana, 22x48 gunite/quartz plaster (3-5-3 depth) & 8' spa w/ spill and 5' natural rock waterfall; Hayward DE filter/pumps/heater; Hayward Pro Logic controller; Phantom cleaner. Finished 06/01/07.

    RedishConstruction.com

  11. Back To Top    #11
    ivyleager's Avatar
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    How much acid in a week? Well, back in the 70's about 1-2/week



    I couldn't resist.............................................
    CaryB
    36 x 18 IG vinyl, 25K, 1 HP pump, sand filter
    1 skimmer, 2 returns, no main drain
    Old school: PoolSolutions test kit

  12. Back To Top    #12
    iggy's Avatar
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    Re: How much acid in a week

    Your survey results will be flawed because the lowest amount you had was 0 to 1 gal a week.
    I use 8 oz a week which is 1 gal for 2 months.

    Iggy
    In-Ground SWG pool 11,000 gal., Jandy CL460 Filter, 1.5hp Stealth Jandy pump, Paramount PV3 In-Floor cleaning sys., Goldline SWG, Hayward Color Logic 2.5 LED Light

  13. Back To Top    #13
    divnkd101's Avatar
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    I don't think anyone has asked this question yet... What Strength of Acid are you using?????
    MIKE

    21K Inground Custom w/ Spa (Gunite/Plaster), SWCG, Hayward Northstar, Polaris 280, Hayward Color Logics, Jandy PS-8

  14. Back To Top    #14

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    Valrico, FL
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    I use about 32 oz of 34% acid each week. Mt TA is around 90 and borates are 50 ppm. I usually add acid when pH gets to 7.7 or 7.8, and the 32 oz lowers the pH to 7.2 or 7.3.
    7,500 gal, IG pool, L shape 22' x 15', 1.5 hp pump, cartridge filter, AquaPlus SWG/Controller, Pebble-Tec liner.

  15. Back To Top    #15

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    Location
    Austin, TX
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    -My pool is new, installed and filled Nov 2007. I am using 1.9 gal of acid to keep my PH around 7.4 - 7.5 per week for the last month.
    20k Gunite/Prism Blue-Pebblesheen, Pentair Tagelus TA-100D Sand Filter, Heliocol Solar Water Heater, 2 bubblers and 2 waterfalls installed 2007, 3hp IntelliFlo VS Pump 011018 installed 2013, Aquabot Turbo T4 RC and Stenner 45MHP10 w/The Liquidator container installed 2012.
    Antigua Spa by Artesian Spas: 325 gl, 52 jets, 6 hp 2 sp & 6 hp 1 sp, Circulation System 24 Hour Whisper Pure, Ozonator, LED digital lighting, The Artesian Pillowfall installed 2007.
    Retired: 2hp Pentair Whisperflow, Legend Platinum w/booster pump, PH Adjuster

  16. Back To Top    #16
    iggy's Avatar
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    Re: How much acid in a week

    As I continue to read this post I notice a great deal of you are using very large amounts of acid.
    I don't even come close in using the amount others are using.
    I know my pool is much smaller, temps are equal or above Florida or Texas and we have lots of sun here in Arizona.
    My GoldLine specs say that I should maintain
    pH between 7.2 and 7.8
    TA between 80 and 120
    CA 200 - 275
    CYA 60 - 80

    My present chemistry is
    FC 2-3 ppm
    pH 7.7
    TA 110 -120
    CA 250
    CYA 80
    And all I use is a cup (8 oz) of acid a week to maintain my balance.
    Why are many usings gallons of acid a week?

    Please don't get me wrong but I can see why many have went to BBB and other ways to balance water.
    I will use more for swimming season but not gallons a week.
    In-Ground SWG pool 11,000 gal., Jandy CL460 Filter, 1.5hp Stealth Jandy pump, Paramount PV3 In-Floor cleaning sys., Goldline SWG, Hayward Color Logic 2.5 LED Light

  17. Back To Top    #17

  18. Back To Top    #18
    Guest
    Quote Originally Posted by Strannik
    it's very rare for people to go to anything else once they tried SWC systems
    I second that!

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