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Thread: I've got blisters on my fingers!!!

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    I've got blisters on my fingers!!!

    Last year upon opening the pool, the plaster felt wonderfully smooth, except in the spa, it began to feel jagged. There was also an issue with the coping (pool is in third season) and so upon returning to the scene, they ?fixed? (builder rant insert here). They never addressed the roughness in the Spa. We had brushed it, though how well is debatable. Round Hold, square brush.
    So this year upon opening, it was worse. I believe after gathering some info is that its the calcium scale build up. Warm/Hot Spa that doesnt always get recirculated to the main body often enough so my unproffesional opinion is the chemistry in the water is perfect for that type of effect.
    I bought pumice block, seems to work somewhat without the draining of water, works even better with light film of water, more of like a wet sanding than total immersion. I dare not to hit it dry. However its really not coming off to my satisfaction. Im wearing out pumice block at a quick rate. One tip, get rubber gloves, between the feeling of the plaster for smoothness and the pumice block I ended up with bloody finger tips.
    My next attempt is to mix up a light mixture of Muriatic Acid and use that in conjuction with the the pumice block to perhaps loosen the scale even more so. My concern is with the finish of the pool. I have been putting a bit of elbow grease in to get the stubborn build up off. I dont see white of blue specks in the pumice dust left behind from the sanding. Infact its a bit difficult to see the scale from the white portion of the finish, and the blue is less faint cause of the scale, but its a fine line and the best way i can tell is by feel. I have gotten some good results on the seated areas probably cause its flat and the block conforms to it, and it was probably the most brushed part of the spa when the plaster was curing.

    My question is, what % of mix of 34.5 and water should i go at it with first?

    I've ordered the TFtestkit, here is the numbers of my last water sample from the commercial place, went by there this morning and the parking lot was overflowing and after hearing they have resorted to using the restaurant pager routine, I am so happy to have found this place

    Thanks
    Evan

    5/21/08
    Free Chlorine 8.7
    Total Chlorine 8.7
    PH 8.2
    Total Alkalinity 80
    CYA 30
    Total Disolved 2400
    Total Hardness 150
    Nitrate 20
    * they had me add the following
    4lbs of stabilizer
    !gal 34.5% Muriatic
    25lbs of Calcium (over 5 days though i havent completed that as of yet)
    34k Gunite IGP, 8person attach spa, 4cart filter, 40k btu heater, , SWG, 3m marbelite finish, 12 panel fafco solar heater

  2. Back To Top    #2
    JasonLion's Avatar
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    Scaling happens when the PH gets too high. You should always keep the PH between 7.2 and 7.8 if you possibly can.

    PH can rise rapidly in a spa because of the aeration from the spa jets. You can limit this somewhat by lowering your TA level, which the acid you have already added should get started on.

    The advice you quote looks fairly good.

    I would try starting with ten parts of water and one part of acid and get a feel for working with the acid. When you feel comfortable with it you can move the concentration up to 6 to 1 and then 4 to 1. Higher concentrations will work more quickly but require that you pay more attention not to put too much in one place.
    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

  3. Back To Top    #3
    No P in my ool's Avatar
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    I've got blisters on my fingers!!! John Lennon fan?
    21' Leslies Beachland Ag Pool, 10,000 gallons, professionally installed (best money I ever spent) Hayward 16" sand filter w/Pentair two speed pump Fafco 4x20 solar heater,Aqua Trol RJ. Borates added. Hard plumbed.

  4. Back To Top    #4
    Quote Originally Posted by No P in my ool
    I've got blisters on my fingers!!! John Lennon fan?

    sure, plus it fit the post i suppose, more so than "Imagine theres no scale.."
    I see in your sig you have a fafco heater also, how old is yours? any issues? Ive been toying with the idea of going with a solar control ball valve. I miss turning on and off sometimes and as you probably know, not only is the solar great for heating but it will cool the pool down even faster.
    34k Gunite IGP, 8person attach spa, 4cart filter, 40k btu heater, , SWG, 3m marbelite finish, 12 panel fafco solar heater

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    No P in my ool's Avatar
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    No problems so far. It is not automated,I just watch the next day weather forecast and turn it on. If the forecast turns out to be wrong I call mt wife and tell her to turn it off.
    21' Leslies Beachland Ag Pool, 10,000 gallons, professionally installed (best money I ever spent) Hayward 16" sand filter w/Pentair two speed pump Fafco 4x20 solar heater,Aqua Trol RJ. Borates added. Hard plumbed.

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    Lershac's Avatar
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    Quote Originally Posted by brakes
    I miss turning on and off sometimes and as you probably know, not only is the solar great for heating but it will cool the pool down even faster.
    Can you clarify what you mean by this?

    I THINK you mean that if you run your solar heating at a time when the solar panels are not in the sun, they cool your pool off? Is that what you mean by that?

    We live in Baton Rouge and its common in August to "close" the pool b/c its like swimming in warm spit. Ugh. Fountains really help that but with high humidity sometimes even that is not enough.

    I dont personally have a pool but have friends and family and neighbors with them (and soon enough I will have one too, saving like a demon) and I have often wanted to experiment with different ways to cool the pool off.

    For a blast one year we had a couple of truckloads of ice brought in and we kept the pool cool that way... it was funny shovelling ice into the pool every hour or so to bring it down. Its a heck of a thermal mass.
    (DIY):16K Gal 20X30 rectangular IG Gunite, w/spa, CCP 520 filter,2 Pentair VS pumps, 400KBTU Pentair gas heater, Heat Pump for cooling, **update5.25.2013** added an intellichem with acid pump that will control existing SWG. My Build Thread Here

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    Join Date
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    Lershac,

    Solar panels are often used at night to help cool the pool water.

    Titanium
    24,000 gallon inground freeform pool/spa circa 1983 (113 ft perimeter, 625 sq ft) with 350 gallon attached spill-over spa
    2007 2 HP, three-phase Hayward TriStar pump which is powered by an Ikeric VS-200 variable speed drive system
    1983 Laars XE Pool/Spa Heater Type ES 400,000 BTU, 1998 Hayward Super Star-Clear C-4000 cartridge filter (400 sq ft, 4 separate cartridges)
    1998 Polaris 380 pressure-side cleaner w/ 3/4 HP booster pump
    One skimmer :( and one PoolSkim :), One Supervision Galaxy LED pool lamp, Second story solar panels
    Hayward/GoldLine AquaLogic PS4 (replaced 1983 vintage dual circuit Intermatic timer)

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