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Thread: Calcium scaling - i messed up?

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    Calcium scaling - i messed up?

    As I indicated in another post about this topic,

    My Plaster was finished early June last year and when I opened last week the PH was very high. After three gallons of 32% acid (over a three day period) it went down to about 7.4. I ran my Polaris for a couple of days and it kept filling up with what looked like crushed ice. But now reading the other thread about calcium scaling I assume it was calcium (although it looked more crushed than the pictures posted there). Anyway I ran my hand over the walls and I felt the roughness. On the other post, it was suggested to lower the PH to 7.2, and I just did that, but I THINK THAT WAS A MISTAKE FOR ME. MY CSI was within the acceptable range, but now it will be -1.0

    MY CH is 225 (hasn't changed since opening), TA 60 (hasn't changed since opening), CYA 30 (hasn't changed since opening), FC over 5 (I didn't do the more precise test this morning). MY CSI was -.42 this morning, but I read in the other thread (which was addressing someone else) that PH should be lowered to about 7.2 to prevent scaling. I just poured in the Acid, but now I realize that a lower PH will cause my CSI will drop to -1.0.

    What should I do?

    Thanks
    1200 Sq Ft 41,000 Gal. Gunite, JANDY SVRS VS pump, JANDY JXI 400,000 BTU, Polaris 280 w/ 3/4 BP, Rockwall and Grotto (w/6 jets and blower), 2 JANDY Lam Jets, 2 LED Bubblers, 5 Ledlights, AQUALINK P16 RS, 90% Quartz, SWF 185 GMP BP, SWF 125 BP, Levelor K1100 Autofill, AP Digital SWG, 2 skim and 5 returns, and mostly 3 inch piping

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    Richard320's Avatar
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    Re: Calcium scaling - i messed up?

    Brush!

    It won't take long for the scale to dissolve and go into solution, raising the CH and by extension, CSI.

    Or just add some baking soda to raise TA which will raise CSI. However, it will also cause pH to rise faster.
    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: Calcium scaling - i messed up?

    Should I raise my calcium hardness directly by adding calcium chloride?
    1200 Sq Ft 41,000 Gal. Gunite, JANDY SVRS VS pump, JANDY JXI 400,000 BTU, Polaris 280 w/ 3/4 BP, Rockwall and Grotto (w/6 jets and blower), 2 JANDY Lam Jets, 2 LED Bubblers, 5 Ledlights, AQUALINK P16 RS, 90% Quartz, SWF 185 GMP BP, SWF 125 BP, Levelor K1100 Autofill, AP Digital SWG, 2 skim and 5 returns, and mostly 3 inch piping

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    Richard320's Avatar
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    Re: Calcium scaling - i messed up?

    Quote Originally Posted by grottoguy View Post
    Should I raise my calcium hardness directly by adding calcium chloride?
    No. It will go up as the scale dissolves.
    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: Calcium scaling - i messed up?

    Thanks Richard. What should I be doing with my PH? What level should I keep it at to prevent scaling?
    1200 Sq Ft 41,000 Gal. Gunite, JANDY SVRS VS pump, JANDY JXI 400,000 BTU, Polaris 280 w/ 3/4 BP, Rockwall and Grotto (w/6 jets and blower), 2 JANDY Lam Jets, 2 LED Bubblers, 5 Ledlights, AQUALINK P16 RS, 90% Quartz, SWF 185 GMP BP, SWF 125 BP, Levelor K1100 Autofill, AP Digital SWG, 2 skim and 5 returns, and mostly 3 inch piping

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    Mod Squad pooldv's Avatar
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    Re: Calcium scaling - i messed up?

    You need to keep your CSI score between -0.3 and +0.3. Enter all your test results in poolmath and see what PH is needed based on current TA, CH, water temp, etc. PH is the easiest of the levels to adjust that impact CSI.

    More here
    Pool School - Calcium Scaling
    and here
    Langelier and Calcite Saturation Indices (LSI and CSI)
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    2012 build and pics, 20k gal gunite, black onyx pebblesheen, OK flagstone, IntellifoVS, cart filter w/Pleatco, IC40 SWG, Solartouch, 5 12'x4' solar panels, HP50HA heat pump, 8mil solar cover, borates, TF-100 test kit, SONOS, Doheny's Discovery Robot, hot tub on bleach

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    Re: Calcium scaling - i messed up?

    Just to clarify, it's not -.6 and positive .6. It's between -.3 and + .3. Is that because I already have a problem?
    1200 Sq Ft 41,000 Gal. Gunite, JANDY SVRS VS pump, JANDY JXI 400,000 BTU, Polaris 280 w/ 3/4 BP, Rockwall and Grotto (w/6 jets and blower), 2 JANDY Lam Jets, 2 LED Bubblers, 5 Ledlights, AQUALINK P16 RS, 90% Quartz, SWF 185 GMP BP, SWF 125 BP, Levelor K1100 Autofill, AP Digital SWG, 2 skim and 5 returns, and mostly 3 inch piping

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    Mod Squad pooldv's Avatar
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    Re: Calcium scaling - i messed up?

    No, if you keep it between the 3s then there is a little room for numbers to shift a bit and stay between the 6s in between tests.
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    2012 build and pics, 20k gal gunite, black onyx pebblesheen, OK flagstone, IntellifoVS, cart filter w/Pleatco, IC40 SWG, Solartouch, 5 12'x4' solar panels, HP50HA heat pump, 8mil solar cover, borates, TF-100 test kit, SONOS, Doheny's Discovery Robot, hot tub on bleach

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    Re: Calcium scaling - i messed up?

    Ok. Thanks
    1200 Sq Ft 41,000 Gal. Gunite, JANDY SVRS VS pump, JANDY JXI 400,000 BTU, Polaris 280 w/ 3/4 BP, Rockwall and Grotto (w/6 jets and blower), 2 JANDY Lam Jets, 2 LED Bubblers, 5 Ledlights, AQUALINK P16 RS, 90% Quartz, SWF 185 GMP BP, SWF 125 BP, Levelor K1100 Autofill, AP Digital SWG, 2 skim and 5 returns, and mostly 3 inch piping

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