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Thread: Any ideas?

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    twinkiesmommy2009's Avatar
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    Any ideas?

    Hi everyone!

    Looking for some help. We have this one spot in our pool that has shown up. It's very hard and does not come off with brushing.


    We haven't been in the pool yet to try taking a razor blade to it or anything but we have tried scrubbing it with the brush and with our fingers. Any ideas?

    We brush the pool and test weekly.

    Test Results from 15 minutes ago...:

    pH: 7.6
    TA: 125 (working on bringing it down)
    CH: 325
    FC: 6.2
    CC:0
    CYA: 70-80
    Salt: 3300
    Temp: 66
    CSI:-0.12




    Started 5/31/16. 38'x23', 618 sqft., <14,000 gallons, 8' spa.Travertine coping. Raised beam w/3 sheers. Large sunshelf w/3 bubblers. SWG IC40, Pentair VSP, 520 cartridge, color LED lights, Easy-touch, screen logic, Maytronics S300i robot, and Wet Edge Prism Matrix finish (Deep Sea Blue with Indigo plaster). Build Thread: Another in Texas - Cypress Texas | MUD District | HOA Approval | Great Escapes Pools

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    JoyfulNoise's Avatar
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    Re: Any ideas?

    It's calcium scale from the stacked stone above it. I get an exact same spot near my waterfall as water runs over the stones and then down some mortar before leaving the exact same sized white patch you have. There must be a slow drip of water coming from the gap in the stone there; some kind of penetration/permeation.

    Dilute muriatic acid and a stiff tampico brush will slowly take it off unless you have access to sand blasting equipment....
    Matt
    16k IG PebbleTec pool, 650gal spa, spillway and waterfall, 3HP IntelliFlo VS / 1.5HP WhisperFlo, Pentair QuadDE-100 filter, IC40 SWCG, MasterTemp 400k BTU/hr NG heater, KreepyKrauly suction-side cleaner Dolphin S300i robot, EasyTouch controls, city water, K-1001, K-2006 and K-1766 test kits, Mannitol test for borates

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    JoyfulNoise's Avatar
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    Re: Any ideas?

    Actually, looking at the wide angle shot, the water is migrating from the spa spillway. It's probably travelling along the grout lines of the various stones and just dribbling out at that point. It's probably not even noticeable.

    Elbow grease....good, old-fashioned elbow grease. Then, after you clean it off...it will come right back again

    (sorry, I'm the anti- )
    Matt
    16k IG PebbleTec pool, 650gal spa, spillway and waterfall, 3HP IntelliFlo VS / 1.5HP WhisperFlo, Pentair QuadDE-100 filter, IC40 SWCG, MasterTemp 400k BTU/hr NG heater, KreepyKrauly suction-side cleaner Dolphin S300i robot, EasyTouch controls, city water, K-1001, K-2006 and K-1766 test kits, Mannitol test for borates

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    Mod Squad kimkats's Avatar
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    Re: Any ideas?

    Could she put a dab of something to stop it from coming to that area?

    LOL on the anti-

    No you are just telling real life Matt. Better she knows and maybe can find a way to fix it or learn to live with it.

    Kim
    TFP Moderator 33x52 round AG 25,600 gals Sand Filter 1.5hp Pump - 2 Speed, SLAM, Pool School, Recommended Levels, Recommended Chemicals, Pool Math, Chlorine/CYA Chart, TF-100 Test Kit

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    JoyfulNoise's Avatar
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    Re: Any ideas?

    Quote Originally Posted by kimkats View Post
    Could she put a dab of something to stop it from coming to that area?

    LOL on the anti-

    No you are just telling real life Matt. Better she knows and maybe can find a way to fix it or learn to live with it.

    Kim
    And there you go offering hope...just makin' my job harder

    That's one of those situation where the "cure" might look worse than the "disease". Someone with way more skillz than me might be able to grind out that scale and then fill the gap with a carefully selected silicone or urethane caulk to match the color perfectly....me, I left my calcium patch in place and just consider it a birthmark....my OCD is trained on other things at the moment.


    Matt
    16k IG PebbleTec pool, 650gal spa, spillway and waterfall, 3HP IntelliFlo VS / 1.5HP WhisperFlo, Pentair QuadDE-100 filter, IC40 SWCG, MasterTemp 400k BTU/hr NG heater, KreepyKrauly suction-side cleaner Dolphin S300i robot, EasyTouch controls, city water, K-1001, K-2006 and K-1766 test kits, Mannitol test for borates

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    Re: Any ideas?

    Quote Originally Posted by JoyfulNoise View Post
    And there you go offering hope...just makin' my job harder

    That's one of those situation where the "cure" might look worse than the "disease". Someone with way more skillz than me might be able to grind out that scale and then fill the gap with a carefully selected silicone or urethane caulk to match the color perfectly....me, I left my calcium patch in place and just consider it a birthmark....my OCD is trained on other things at the moment.


    Sent from my iPhone using Tapatalk
    Joyfulnoise, what is the negative of removing it with muriatic acid?

    Thanks!


    Matt- IG gunite pool and spa built Summer 2016: 32' x 20' overall with two 4' x 8' tanning ledges. 6'x6' attached spa with spillover. Depth 3' to 5' to 4'. 16.4K gal. Lueders Limestone retaining wall and coping. Equip: Pentair SVRS vari. speed pump. Pentair 60 sq. ft. DE filter. Pentair Kreepy Crawly Plat. cleaner. Pentair MasterTemp 400,000 BTU NG heater. 1.5 HP spa air blower. Nature2 Sanitizer. Taylor K-206C. My 2016 Build

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    JoyfulNoise's Avatar
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    Any ideas?

    Quote Originally Posted by mwalling View Post
    Joyfulnoise, what is the negative of removing it with muriatic acid?

    Thanks!


    Sent from my iPad using Tapatalk
    Damage/discoloration to the surrounding stone work. Loosening or removal of the tile grout. And just the general hazard of messing around with acid (WEAR EYE PROTECTION!).

    Other than that, it can be removed. I do believe there's a scale removal gel, has the consistency of thick toilet bowl cleaner, that the pros use. HOWEVER, you have to be really careful to not let that stuff dribble down the and hit the plaster as it can discolor and etch plaster. It's thick and viscous so it doesn't readily dissolve. I believe it's a mixture of muriatic acid, phosphoric acid and hydrofluoric acid. Very corrosive stuff but it does the trick.

    The other non chemical option is kierserite blasting (a form of soda blasting) but that requires a specialist.


    Matt
    16k IG PebbleTec pool, 650gal spa, spillway and waterfall, 3HP IntelliFlo VS / 1.5HP WhisperFlo, Pentair QuadDE-100 filter, IC40 SWCG, MasterTemp 400k BTU/hr NG heater, KreepyKrauly suction-side cleaner Dolphin S300i robot, EasyTouch controls, city water, K-1001, K-2006 and K-1766 test kits, Mannitol test for borates

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    Re: Any ideas?

    Quote Originally Posted by JoyfulNoise View Post
    Damage/discoloration to the surrounding stone work. Loosening or removal of the tile grout. And just the general hazard of messing around with acid (WEAR EYE PROTECTION!).

    Other than that, it can be removed. I do believe there's a scale removal gel, has the consistency of thick toilet bowl cleaner, that the pros use. HOWEVER, you have to be really careful to not let that stuff dribble down the and hit the plaster as it can discolor and etch plaster. It's thick and viscous so it doesn't readily dissolve. I believe it's a mixture of muriatic acid, phosphoric acid and hydrofluoric acid. Very corrosive stuff but it does the trick.

    The other non chemical option is kierserite blasting (a form of soda blasting) but that requires a specialist.


    Sent from my iPhone using Tapatalk
    Thank you!!


    Matt- IG gunite pool and spa built Summer 2016: 32' x 20' overall with two 4' x 8' tanning ledges. 6'x6' attached spa with spillover. Depth 3' to 5' to 4'. 16.4K gal. Lueders Limestone retaining wall and coping. Equip: Pentair SVRS vari. speed pump. Pentair 60 sq. ft. DE filter. Pentair Kreepy Crawly Plat. cleaner. Pentair MasterTemp 400,000 BTU NG heater. 1.5 HP spa air blower. Nature2 Sanitizer. Taylor K-206C. My 2016 Build

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    twinkiesmommy2009's Avatar
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    Re: Any ideas?

    It's a brand new pool and was only open one month last season. Our water stays well balanced. Is this just a common problem with that type of travertine? We still have some warranty work that needs to be done. Is this something the PB should be responsible for?


    Started 5/31/16. 38'x23', 618 sqft., <14,000 gallons, 8' spa.Travertine coping. Raised beam w/3 sheers. Large sunshelf w/3 bubblers. SWG IC40, Pentair VSP, 520 cartridge, color LED lights, Easy-touch, screen logic, Maytronics S300i robot, and Wet Edge Prism Matrix finish (Deep Sea Blue with Indigo plaster). Build Thread: Another in Texas - Cypress Texas | MUD District | HOA Approval | Great Escapes Pools

  10. Back To Top    #10
    JoyfulNoise's Avatar
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    Re: Any ideas?

    It's not a matter of pool age or how well balanced the water is. The chemistry of the water that runs down the face of those stones and infiltrates it's way through those stones is drastically different than the bulk of the pool water and will always have a much higher scaling potential. The water simply absorbs lots of calcium out if the stone and mortar and becomes very prone to depositing scale. You're going to eventually see the same thing happen to the waterline tile at the water level - bath tub ring. There's no getting around it, all you can do is slow it down by keeping the chemistry as balanced as possible. This is just the nature of plaster pools with lots of stone work. Typically speaking, you'll need to factor in professional tile cleaning every few years or so (figure about $3-$5 per linear foot of pool tile). Believe it or not, "Mr. Chemistry" here had to have his tile cleaned in year 2 of its life (because I got lazy one winter and let my pH get way too high).

    As for your builder fixing it...no harm in asking, I suppose.





    Matt
    16k IG PebbleTec pool, 650gal spa, spillway and waterfall, 3HP IntelliFlo VS / 1.5HP WhisperFlo, Pentair QuadDE-100 filter, IC40 SWCG, MasterTemp 400k BTU/hr NG heater, KreepyKrauly suction-side cleaner Dolphin S300i robot, EasyTouch controls, city water, K-1001, K-2006 and K-1766 test kits, Mannitol test for borates

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    Re: Any ideas?

    We have the exact same thing. Just use elbow grease. It's there all the time and with dark tile it really stands out.



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    twinkiesmommy2009's Avatar
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    Re: Any ideas?

    Thanks everyone!


    Started 5/31/16. 38'x23', 618 sqft., <14,000 gallons, 8' spa.Travertine coping. Raised beam w/3 sheers. Large sunshelf w/3 bubblers. SWG IC40, Pentair VSP, 520 cartridge, color LED lights, Easy-touch, screen logic, Maytronics S300i robot, and Wet Edge Prism Matrix finish (Deep Sea Blue with Indigo plaster). Build Thread: Another in Texas - Cypress Texas | MUD District | HOA Approval | Great Escapes Pools

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