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Thread: pH levels refusing to rise.

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    pH levels refusing to rise.

    Hi all,

    Got my pool up and running by the local pool company last week, the problem is, since it's been setup, I've been tested the water daily, and it's crystal clear, but the pH levels are seriously low (around 6), I've added around 1kg of pH increaser over the period of a few days, and it's done absolutely nothing. On the chlorine side of things, it's non existent, but I need to sort out this pH before I start adding any (correct?) otherwise I'm basically wasting product.

    So what do I have to do to higher the pH with the products I have?

    (pH Increaser, Chlorine, Alkalinity Tablets)

    Thanks
    25K gal IGP, "L" shape (32'x16'x24') Aluminum walls, 2 Skimmers, 4 returns (installed 2003)
    Hayward 1 1/2 HP SuperPump, Hayward Varflo Sand filter (installed 2003) Sand replaced 3 year ago
    Vinyl liner (installed August 2011, 28 mil)
    Hayward HeatPro HeatPump 140 BTU (installed May 2013)
    Located in NE PA
    Installed PoolFrog (need to replace)

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    duraleigh's Avatar
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    Re: pH levels refusing to rise.

    but I need to sort out this pH before I start adding any (correct?)
    Incorrect. You should make it your priority to get chlorine in your pool......about 3 ppm. Keep it at that level.

    Now, back to the pH, you simply haven't added enough. Add more, it'll come up.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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    Re: pH levels refusing to rise.

    Quote Originally Posted by duraleigh
    but I need to sort out this pH before I start adding any (correct?)
    Incorrect. You should make it your priority to get chlorine in your pool......about 3 ppm. Keep it at that level.

    Now, back to the pH, you simply haven't added enough. Add more, it'll come up.
    So I should shock the pool first, wait an hour or so, then add even more pH increaser? (as I said, I've added around 1kg), there is no problems with adding more?
    25K gal IGP, "L" shape (32'x16'x24') Aluminum walls, 2 Skimmers, 4 returns (installed 2003)
    Hayward 1 1/2 HP SuperPump, Hayward Varflo Sand filter (installed 2003) Sand replaced 3 year ago
    Vinyl liner (installed August 2011, 28 mil)
    Hayward HeatPro HeatPump 140 BTU (installed May 2013)
    Located in NE PA
    Installed PoolFrog (need to replace)

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    Mod Squad jblizzle's Avatar
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    Re: pH levels refusing to rise.

    Welcome to TFP! He did not say "shock" the pool (a term we do not use) he said maintain chlorine in the pool. You need the chlorine to prevent algae from starting. You also need to get stabilizer in the pool and to raise the pH.

    Lots of information to be found in Pool School.
    Jason, TFP Moderator
    18k IG pebblesheen pool, Hayward ProLogic P4 w/ T-15 SWG, Pentair 1HP 2-speed Superflo, Hayward 6020 DE filter
    500 sqft Heliocol solar panels, ThePoolCleaner, TF-100 test kit w/ SpeedStir
    Pool School + Test Kit + PoolMath = A TROUBLE FREE POOL
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    Richard320's Avatar
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    Re: pH levels refusing to rise.

    Welcome!

    Around 6 pH? What kind of tester are you using? I hope it's not <gasp> test strips.

    If you try to chlorinate with dichlor or trichlor dry chlorine, you'll be driving your low pH even lower.

    Could you fill out your location, and the signature block? I see you're using Kg, which leads me to think maybe you're in Canada or Europe, and the advice you get might not be appropriate, as some testers and some chemicals are not readily available in parts of the world. pool-school/read_before_you_post
    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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    Re: pH levels refusing to rise.

    Quote Originally Posted by Richard320
    Welcome!

    Around 6 pH? What kind of tester are you using? I hope it's not <gasp> test strips.

    If you try to chlorinate with dichlor or trichlor dry chlorine, you'll be driving your low pH even lower.

    Could you fill out your location, and the signature block? I see you're using Kg, which leads me to think maybe you're in Canada or Europe, and the advice you get might not be appropriate, as some testers and some chemicals are not readily available in parts of the world. pool-school/read_before_you_post
    Thanks.

    I'm using a testing kit, you basically fill it with water, drop the tablet in there, shake it for 30 seconds or so, and then compare the colour with the guides on the side.

    Yes I am in the UK, the pool is around 17,000 gallons, it's currently pretty sunny so I have read that adding chlorine should be done at night, last year it was totally fine, the levels were perfect, and it was pretty easy to maintain, but now that the levels are so low, and I've been adding product for a few days, I'm just wondering whether I should continue or not (and you guys have stated I should).

    As I stated above, I have pH increase (5kg), Chlorine granules (10kg), Hardener (5kg), Chlorine tablets, pH decrease (5kg), Alkalinity (5kg), and clear water tablets.
    25K gal IGP, "L" shape (32'x16'x24') Aluminum walls, 2 Skimmers, 4 returns (installed 2003)
    Hayward 1 1/2 HP SuperPump, Hayward Varflo Sand filter (installed 2003) Sand replaced 3 year ago
    Vinyl liner (installed August 2011, 28 mil)
    Hayward HeatPro HeatPump 140 BTU (installed May 2013)
    Located in NE PA
    Installed PoolFrog (need to replace)

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    Richard320's Avatar
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    Re: pH levels refusing to rise.

    Quote Originally Posted by NMajor
    As I stated above, I have pH increase (5kg), Chlorine granules (10kg), Hardener (5kg), Chlorine tablets, pH decrease (5kg), Alkalinity (5kg), and clear water tablets.
    I think it's time to start reading labels. I've read that high-strength bleach in large bottles is hard to come by in the EU. If you're in a rural area, you might look at farm supply stores - they sell 12.5% sodium hypochlorite in 20l jugs for sanitizing dairy barns.

    Your chlorine granules and chlorine tablets are likely dichlor and trichlor and they will severely impact pH...not to mention raising CYA. If your Calcium levels will allow it, you might hunt for Calcium Hypochlorite powder.
    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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    Re: pH levels refusing to rise.

    Quote Originally Posted by Richard320
    Quote Originally Posted by NMajor
    As I stated above, I have pH increase (5kg), Chlorine granules (10kg), Hardener (5kg), Chlorine tablets, pH decrease (5kg), Alkalinity (5kg), and clear water tablets.
    I think it's time to start reading labels. I've read that high-strength bleach in large bottles is hard to come by in the EU. If you're in a rural area, you might look at farm supply stores - they sell 12.5% sodium hypochlorite in 20l jugs for sanitizing dairy barns.

    Your chlorine granules and chlorine tablets are likely dichlor and trichlor and they will severely impact pH...not to mention raising CYA. If your Calcium levels will allow it, you might hunt for Calcium Hypochlorite powder.
    So as stated, I did what was said, and I got the Chlorine back up to perfect numbers.

    The pH is still the same (6.8), this pH plus is Soda Ash, so I am just about to add it again to see if it helps.
    25K gal IGP, "L" shape (32'x16'x24') Aluminum walls, 2 Skimmers, 4 returns (installed 2003)
    Hayward 1 1/2 HP SuperPump, Hayward Varflo Sand filter (installed 2003) Sand replaced 3 year ago
    Vinyl liner (installed August 2011, 28 mil)
    Hayward HeatPro HeatPump 140 BTU (installed May 2013)
    Located in NE PA
    Installed PoolFrog (need to replace)

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    JasonLion's Avatar
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    Re: pH levels refusing to rise.

    THe test will report any PH level below 6.8 as 6.8, so you are raising PH but you haven't gotten to 6.8 yet. Keep at it until you get to at least 7.0, since PH below that can damage the pool.
    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

  10. Back To Top    #10

    Re: pH levels refusing to rise.

    Quote Originally Posted by JasonLion
    THe test will report any PH level below 6.8 as 6.8, so you are raising PH but you haven't gotten to 6.8 yet. Keep at it until you get to at least 7.0, since PH below that can damage the pool.
    I see.

    My pool is 17,000 gallons, I am just working out the numbers now.

    Would you recommend using the bucket method or putting it straight into the skimmer?

    If it's the skimmer method, do you know if I need to turn the sump off while adding the pH plus? (have forgotten this). I think it's what I remember was said.

    Edit: So around 1kg of Soda Ash, which is what I added 2 days ago.
    25K gal IGP, "L" shape (32'x16'x24') Aluminum walls, 2 Skimmers, 4 returns (installed 2003)
    Hayward 1 1/2 HP SuperPump, Hayward Varflo Sand filter (installed 2003) Sand replaced 3 year ago
    Vinyl liner (installed August 2011, 28 mil)
    Hayward HeatPro HeatPump 140 BTU (installed May 2013)
    Located in NE PA
    Installed PoolFrog (need to replace)

  11. Back To Top    #11
    JasonLion's Avatar
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    Re: pH levels refusing to rise.

    I recommend pre-dissolving the soda ash in a bucket and then pouring it slowly in front of a return jet with the pump running. That will get it mixed into the water as quickly as possible.
    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

  12. Back To Top    #12

    Re: pH levels refusing to rise.

    Quote Originally Posted by JasonLion
    I recommend pre-dissolving the soda ash in a bucket and then pouring it slowly in front of a return jet with the pump running. That will get it mixed into the water as quickly as possible.
    Already done.

    I added a little manually to the shallow end as it's the furthest away from the jet.

    Thanks for your input.
    25K gal IGP, "L" shape (32'x16'x24') Aluminum walls, 2 Skimmers, 4 returns (installed 2003)
    Hayward 1 1/2 HP SuperPump, Hayward Varflo Sand filter (installed 2003) Sand replaced 3 year ago
    Vinyl liner (installed August 2011, 28 mil)
    Hayward HeatPro HeatPump 140 BTU (installed May 2013)
    Located in NE PA
    Installed PoolFrog (need to replace)

  13. Back To Top    #13

    Re: pH levels refusing to rise.

    Quote Originally Posted by JasonLion
    THe test will report any PH level below 6.8 as 6.8, so you are raising PH but you haven't gotten to 6.8 yet. Keep at it until you get to at least 7.0, since PH below that can damage the pool.
    So I just tested the pool, pH levels are coming out at 7.1.

    Guessing I need to add slightly more to get up to 7.5 or isn't there a real difference?
    25K gal IGP, "L" shape (32'x16'x24') Aluminum walls, 2 Skimmers, 4 returns (installed 2003)
    Hayward 1 1/2 HP SuperPump, Hayward Varflo Sand filter (installed 2003) Sand replaced 3 year ago
    Vinyl liner (installed August 2011, 28 mil)
    Hayward HeatPro HeatPump 140 BTU (installed May 2013)
    Located in NE PA
    Installed PoolFrog (need to replace)

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    Mod Squad jblizzle's Avatar
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    Re: pH levels refusing to rise.

    Whether you need to raise it more depends on you plans. If you need to SLAM the pool, then it is fine. If you are going to use bleach, then it is fine. If you are going to use Dichlor or trichlor (not recommended), then you should raise it more.
    Jason, TFP Moderator
    18k IG pebblesheen pool, Hayward ProLogic P4 w/ T-15 SWG, Pentair 1HP 2-speed Superflo, Hayward 6020 DE filter
    500 sqft Heliocol solar panels, ThePoolCleaner, TF-100 test kit w/ SpeedStir
    Pool School + Test Kit + PoolMath = A TROUBLE FREE POOL
    If you found TFP helpful and we saved you money ... Become a TFP Supporter!

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