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Thread: Aeration and PH

  1. #1

    Aeration and PH

    In an attempt to lower TA a little, I have dropped the PH with dry acid, and have been aerating like crazy, but the PH is not coming back up. How long does this usually take?
    Fort Wayne IG Vinyl 18 x 36 (22,000 G)
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  2. #2
    Administrator JasonLion's Avatar
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    The rate of PH increase depends on how high your TA is and to a lesser extent what other factors might be trying to move the PH. A day is a long time to go without seeing any change, an hour without changes wouldn't surprise me if TA isn't too high.
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  3. #3
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    LadywithIron.
    In addition to what Jason said, how much aeration you produce is also important. The more aggressive your aeration, the faster it will go. I aerated my pool to drop TA from 130 to 80 in about 8 hours. Here is a picture of my home-made aerator
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    Senior Member NWMNMom's Avatar
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    Holy guacamole! That is one heck of an aerator!
    18x33x52 Buttressfree Seaspray (Wilbar) AGP - 1.5hp Pentair Maxim w/22" Pentair Meteor Sand Filter, Aqua Rite SWG System, Biltmore Walk In Steps - 2/4x20 Solar Panel Setup - Pool Rover Jr - finally hard plumbed the whole darned thing -
    Beats Driving to the Lake!

  5. #5
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    Here is a picture of my home-made aerator
    Man, do I like that!! PVC is a marvelous invention and you have used it very effectively.

    My only disapoint is that you don't show a picture of the 396 cu in Chevy V-8 engine that MUST be powering that bad boy!!
    Dave S.
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    Member DLO's Avatar
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    I'm off to Home Depot right after I submit this post.
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    In-ground, vinyl lined, 20'x40', 3-10' deep, solar heater, sand filter, 3/4hp pump, Dolphin Pro, Cover Star Auto Cover.

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  7. #7
    Senior Member jjdurrant's Avatar
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    I picked up one of these on eBay:

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    Re:

    Quote Originally Posted by Poseidon
    LadywithIron.
    In addition to what Jason said, how much aeration you produce is also important. The more aggressive your aeration, the faster it will go. I aerated my pool to drop TA from 130 to 80 in about 8 hours. Here is a picture of my home-made aerator
    Holy cow now THAT is what I call adding air to water.

    I was so impressed I had to make my own. It is drying right now and I will definitely be using it when needed. Plus the kids will probably love it!

    Thanks for a great idea and the pics
    Brian
    24' round Vinyl liner Doughboy 48" deep 52" sidewall
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    Beats driving to the lake, and I'm only a block away from the lake!!

  9. #9

    Re: Aeration and PH

    That's a pretty awesome aerator. I've got the high TA problem and my pool jet pointed at the surface stirs it up pretty god but for all practical purposes the TA hasn't budged.

    I have been wondering. Would weighting the end of my shop vac hose into the pool and the (cleaned!) vac set on discharge maybe do the trick???
    ETexas 24,000 Vinyl lined IG cartridge filter:(

  10. #10
    Guest

    Re: Aeration and PH

    Quote Originally Posted by JayGee
    That's a pretty awesome aerator. I've got the high TA problem and my pool jet pointed at the surface stirs it up pretty god but for all practical purposes the TA hasn't budged.

    I have been wondering. Would weighting the end of my shop vac hose into the pool and the (cleaned!) vac set on discharge maybe do the trick???
    You are dropping your pH to 7.0 before aerating,right?
    Aeration does not lower TA. Dropping the pH by adding acid lowers TA. Aeration brings the pH back up without causing TA to rise.

  11. #11
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    Re: Aeration and PH

    I just lowered my TA from 180 to 90 using the acid/aeration method. Doing this took about six lbs of dry acid (left by the previous owners of the house), 1 gal of muriatic acid, and several days. I would add acid each morning and evening bringing the pH down to around 7. After a few hours of aeration the pH would be back to 7.2. I found that no amount of aeration would raise the pH above 7.2.

    I aerated by using a 45 deg elbow and a 2' length of 1 1/2" PVC on the return. This caused a low fountain to break the water surface injecting a surprising amount of air into the water.

    To get the pH to a more comfortable 7.5, I added a few cups of borax after the TA was down to 90.
    11x27 in ground, vinyl pool
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    Pentair 24 sq ft DE filter
    One skimmer, one return (no main drain)

  12. #12

    Re: Aeration and PH

    Quote Originally Posted by waterbear
    You are dropping your pH to 7.0 before aerating,right?
    Aeration does not lower TA. Dropping the pH by adding acid lowers TA. Aeration brings the pH back up without causing TA to rise.
    Actually- no I haven't. I'm new and have been studying a couple different sites. I first stumbled upon this DYI notion on "pool solutions" for whatever that may be worth here. I don't know if there's contradictory suggestions or not. I do know I haven't 'got it' yet. I registered here to settle into one set of advice and one school of thought so as not to be bouncing between them.
    I'm still weeding through the 'pool school.'
    So it's off to lower the PH. At this rate my wife will refuse to get in the pool because of "all the acid in it."
    ETexas 24,000 Vinyl lined IG cartridge filter:(

  13. #13
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    Re: Aeration and PH

    Quote Originally Posted by JayGee
    Quote Originally Posted by waterbear
    You are dropping your pH to 7.0 before aerating,right?
    Aeration does not lower TA. Dropping the pH by adding acid lowers TA. Aeration brings the pH back up without causing TA to rise.
    Actually- no I haven't. I'm new and have been studying a couple different sites. I first stumbled upon this DYI notion on "pool solutions" for whatever that may be worth here. I don't know if there's contradictory suggestions or not. I do know I haven't 'got it' yet. I registered here to settle into one set of advice and one school of thought so as not to be bouncing between them.
    I'm still weeding through the 'pool school.'
    So it's off to lower the PH. At this rate my wife will refuse to get in the pool because of "all the acid in it."
    Don't worry about it, I made the same mistake the first time I tried it.

    I aerated, and my PH went up a bit...TA didn't budge. I was like Huh? Went a re-read the article....oh.Duh.

    It's all so overwhelming at first, it's easy to miss things. Good luck on your process!
    Helpful links: Pool School; CYA/Chlorine Chart
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  14. #14
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    Re: Aeration and PH

    How's this for aeration?

    Thanks for all the great idea's.
    Attached Images Attached Images
    Bob
    18,500 gal IG Vinyl pool, 300lb sand filter/1.5 hp pump, 925V Hayward Navigator Pool Cleaner,
    192 sq ft solar heat, TF-100 test kit, BBB for pool chemistry and love it.
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  15. #15
    Senior Member AV8TOR's Avatar
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    Re:

    Quote Originally Posted by Poseidon
    LadywithIron.
    In addition to what Jason said, how much aeration you produce is also important. The more aggressive your aeration, the faster it will go. I aerated my pool to drop TA from 130 to 80 in about 8 hours. Here is a picture of my home-made aerator
    Anyone have an idea if this is using screwed in nozzles or just holes drilled? The flow seems rectangular not round like a hole would do. I have a portable 1/2hp 1855 GPH portable pump that has 1-1/2 outlets. Any idea if a "T" bar like this with some holes drilled in would be enough to use on TA reduction aeration? Which method is better shoot the water down or make a sprinkler out of the pump and shoot it higher?
    16,000 gal IG Double Roman Plaster Pool (16yrs - plaster redone 2014)
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  16. #16
    Senior Member ultra800_96's Avatar
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    Re: Aeration and PH

    I made mine from a sump pump I had around. I brought the pipe up to pool height, tee'd it, then drilled 12 1/8" holes in the pipes on each side of the tee. I capped off the ends, & fit the pipes in the tee. I didn't glue the pipes going sideways from the tee, and I can point them different directions if I want, they hold in really good & usually I point one up in the air & one more straight out to maximize the water surface area. The pressure from the jets holds the pipes & tee firmly against the pool wall, so I don't have to fasten it to anything. I've brought my TA down from 250 to a current 120 & still going.
    12,900 Gal. 24' X 48" ABG Vinyl Round (17th Birthday)
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