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Thread: Rebalance Water For New Vinyl Liner

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    Rebalance Water For New Vinyl Liner

    Test Results At 10AM, 9/11/15. FC-.5, CC-0, pH-7.8, TA-160, CH-175, CYA-?. Tested 12 hours later after after adding 1.25 gallon of liquid chlorine (sodium hypochlorite 10.5%) and only change was FC-6, CC-.5, CH-200. The pool leaked an inch of water roughly every 12 hours for 6 days after the initial refill before a leak around the light and steps was repaired. The water was replaced daily with a hose from our well. The water has stayed clear thru all this. I had to fill the CYA tube full to make the black dot disappear. The only CYA added was thru 4 small barrell shaped chlorinator tablets (2 to a skimmer basket) thru all this and they still haven't completely dissolved as I remove them when the pump isn't running. Test Strips show the CYA to be in the 30 to 50 range but I know these are supposedly not accurate. I think I need to get my CYA up and possibly my TA down. I don't mind buying the liquid form of CYA if it will speed up this rebalance as I am anxious to close my pool. Current temperature is 79 degrees. Suggestions welcome!!!
    33,000 gallon, IG vinyl, Nautilus FNS PacFab DE filter (7, 12 in grids and 1 partial), 1HP Hayward Super Pump Mod#SP2607X10, 3\4HP Polaris PB4-60 Booster Pump, Well Water, TF-100 Test Kit

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    Mod Squad tim5055's Avatar
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    Re: Rebalance Water For New Vinyl Liner

    You really don't want to close the pool with water temperature in the 70's. It is best to wait for the temperature to fall into the 60's, the lower the better.

    Algae reproduction is stunted (but not eliminated) as the temperature drops. In the 60's it is almost nonexistent. That is why we teach close late and open early to avoid a green pool.

    Any chlorine in the water will be gone within a few days of closing the pool. If the water is still in the 70's you are giving the algae a great place to live.
    TFP Moderator 39 X 18 23,000(ish) freeform gunite; built 2007ish; Pentair Triton II TR100 600lb Sand filter; 2 HP Pentair pump with 2.2 HP AO Smith single speed motor; 2 skimmers, 1 main drain, 4 returns w/waterfall, Stenner 45MHP2 3GPD running@ 60% - 15 gal Tank; heated by the sun CYA 200+ when I started - 50 now. Dolphin Supreme M5 Pool Cleaner. Hot Springs SX Spa, 285 gallon

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    Re: Rebalance Water For New Vinyl Liner

    Thanks, I never thought of it but that makes perfect sense! Any suggestions on the chemicals?
    33,000 gallon, IG vinyl, Nautilus FNS PacFab DE filter (7, 12 in grids and 1 partial), 1HP Hayward Super Pump Mod#SP2607X10, 3\4HP Polaris PB4-60 Booster Pump, Well Water, TF-100 Test Kit

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    Re: Rebalance Water For New Vinyl Liner

    Any suggestions on the chemicals?
    Get some chlorine in your pool pronto and keep it in there until your temp get's down into the 60's. Bring your CYA up into the 30-40 range or your Chlorine will be consumed everyday by the sun. The liquid CYA will be much faster.

    read "The ABC's of Pool Water Chemistry" up in Pool School. That'll help you understand why you need to do these things.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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    Re: Rebalance Water For New Vinyl Liner

    Thanks, I'll be looking for some liquid CYA.
    33,000 gallon, IG vinyl, Nautilus FNS PacFab DE filter (7, 12 in grids and 1 partial), 1HP Hayward Super Pump Mod#SP2607X10, 3\4HP Polaris PB4-60 Booster Pump, Well Water, TF-100 Test Kit

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    Re: Rebalance Water For New Vinyl Liner

    Be slow and cautious with your CYA addition. This is easy to do with liquid.

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    Re: Rebalance Water For New Vinyl Liner

    How long do you have to wait for an accurate reading after adding the liquid form of CYA? Just curious as I haven't bought it yet.
    33,000 gallon, IG vinyl, Nautilus FNS PacFab DE filter (7, 12 in grids and 1 partial), 1HP Hayward Super Pump Mod#SP2607X10, 3\4HP Polaris PB4-60 Booster Pump, Well Water, TF-100 Test Kit

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    Re: Rebalance Water For New Vinyl Liner

    I just bought some liquid CYA that is 35% Monosodium cyanurate monohydrate and Percentage of Constituents Ineffective as Spray Adjuvants 65%. It's equivalent to 30% cyanuric acid. The product says it is a salt and not an acid with a pool friendly pH, so it will not damage pool surfaces or equipment. It was expensive and I only bought a gallon and haven't used it yet. I think I'm going to need at least one more gallon. Comments or Suggestions Welcome before I use it! There are no instructions on how long to wait before testing for CYA after adding the product. To be safe, I figure 24 hours.
    33,000 gallon, IG vinyl, Nautilus FNS PacFab DE filter (7, 12 in grids and 1 partial), 1HP Hayward Super Pump Mod#SP2607X10, 3\4HP Polaris PB4-60 Booster Pump, Well Water, TF-100 Test Kit

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    Re: Rebalance Water For New Vinyl Liner

    The only msds that I can find for 35% has the remaining percentage as water. What is the brand name of the product you purchased?

    You should be able to test CYA as soon as water circulates well, about 2 hours to be safe. Some may say 24 hours.

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    Re: Rebalance Water For New Vinyl Liner

    Instant Pool Water Conditioner by Natural Chemistry
    33,000 gallon, IG vinyl, Nautilus FNS PacFab DE filter (7, 12 in grids and 1 partial), 1HP Hayward Super Pump Mod#SP2607X10, 3\4HP Polaris PB4-60 Booster Pump, Well Water, TF-100 Test Kit

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    Re: Rebalance Water For New Vinyl Liner

    Ha. Leslie's is tricky in their msds. I can't tell you what the other ingredients are... Sorry.

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    Re: Rebalance Water For New Vinyl Liner

    After adding 2 gallons of the liquid stabilizer, my CYA is now 40. Thru this 3 or 4 day process my pH has gone from 7.8 to 8.2. My CC is currently 3 and my TA has been in the 150 to 160 range since the pool was refilled. Water temp is down to 74 degrees and the pool looks good. Pool business says leave pH and TA alone. Comments or suggestions?
    33,000 gallon, IG vinyl, Nautilus FNS PacFab DE filter (7, 12 in grids and 1 partial), 1HP Hayward Super Pump Mod#SP2607X10, 3\4HP Polaris PB4-60 Booster Pump, Well Water, TF-100 Test Kit

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    Re: Rebalance Water For New Vinyl Liner

    Use muriatic acid and lower your pH to 7.2.

    Adding MA will also bring down the TA a little, its a bit of a process and takes time, but the TA will eventually come down as you continue to control the pH. The TA as it is, isn't a problem though.

    If your CC is really 3, then thats indicative of the FC being oxidized by organics. If I were you and since the water is clear, I would raise the FC to SLAM level (16), and keep it there for a day or two and then do a Overnight Chlorine Loss Test and see if that will get rid of the CC's.

    If you have more than 1ppm loss overnight, then there are organics, (most likely algae), consuming the chlorine.
    Keep the FC level at 16 or slightly higher, until you dont loose more than 1 ppm FC overnight, and you have .5 CC or less.

    Adjust your pH to 7.2 before raising the FC level though.
    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: Rebalance Water For New Vinyl Liner

    Did you mean 3CC or 3FC? Why don't you give us your current readings for both.

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    Re: Rebalance Water For New Vinyl Liner

    Thanks for the pH and slam advice Dave. After looking at Marian's question, I realize I mistakenly posted my FC as CC. Sorry for the confusion. I assume I should still lower my pH and ignore the slam. Sorry for not posting all my #'s. The pool hasn't run for 3 hours but i went shoulder deep for a water sample in the deep end. My FC is 2 and my CC is .5. I plan to start the pool up at 5AM before I leave for work and add a half gallon of chlorine. When I get home around 3PM tomorrow, I'll start working on the pH. I'll check this thread before I start on the pH. Once again, thank both of you for your help!
    33,000 gallon, IG vinyl, Nautilus FNS PacFab DE filter (7, 12 in grids and 1 partial), 1HP Hayward Super Pump Mod#SP2607X10, 3\4HP Polaris PB4-60 Booster Pump, Well Water, TF-100 Test Kit

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    Re: Rebalance Water For New Vinyl Liner

    ahhhhh OK.
    well .5 CC sound MUCH better than 3!
    You shouldn't need to slam it.

    Yes, you should still lower the pH, 7.2 to 7.5 would be a good number.



    Quote Originally Posted by robfletch View Post
    Thanks for the pH and slam advice Dave. After looking at Marian's question, I realize I mistakenly posted my FC as CC. Sorry for the confusion. I assume I should still lower my pH and ignore the slam. Sorry for not posting all my #'s. The pool hasn't run for 3 hours but i went shoulder deep for a water sample in the deep end. My FC is 2 and my CC is .5. I plan to start the pool up at 5AM before I leave for work and add a half gallon of chlorine. When I get home around 3PM tomorrow, I'll start working on the pH. I'll check this thread before I start on the pH. Once again, thank both of you for your help!
    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: Rebalance Water For New Vinyl Liner

    FC 7.5
    CC .5
    pH 7.8
    TA 130(pink) 140(red) again
    CH 175
    CYA 40?

    I added a half galloln of muriatic acid after my last post and the pH came down to 7.5. A few days later, it was back to 7.8. I put half of the remaining half gallon of acid in and it returned to 7.5 again. A few days later I put the remainder of the gallon in as it was back to 7.8 again and today I'm back to 7.8 again after a few days. Sorry I can't be more specific than "a few days" as I know you probably need that info. Does my TA need to come down? Also I have fiberglass steps and am curious about my CH being harmful for them. Temperature is 72 and water is clear. I almost forgot. How many days of what temperature does it take for an inground pool to reach 60 degrees?
    33,000 gallon, IG vinyl, Nautilus FNS PacFab DE filter (7, 12 in grids and 1 partial), 1HP Hayward Super Pump Mod#SP2607X10, 3\4HP Polaris PB4-60 Booster Pump, Well Water, TF-100 Test Kit

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