Become a TFP Supporter Pool Math Forum Rules Pool School
Results 1 to 6 of 6

Thread: Plaster in ground pool, brought my CH up from 140 to 270...am I good?

  1. Back To Top    #1

    Join Date
    Apr 2016
    Location
    Youngsville, LA
    Posts
    272

    Plaster in ground pool, brought my CH up from 140 to 270...am I good?

    I was a bit worried about my CH being too low for my plaster in ground pool, so I ended up adding 16 pounds of Calcium Chloride and it brought my CH up to 270 now. Each 4 pounds brought it up about 30ppm. Should I get another 4 pounds to bring it up to 300-310 or is 270 sufficient now? Thanks!

    P.S. What exactly does "calcium leaching" look like in the plaster? Is it just white spots or does the plaster actually degrade? Googled it, but got a bunch of different pics, so I'm not sure now.
    15k Gallon In Ground Saltwater Gunite Pool and Spa w/ Overflow
    Dolphin Nautilus Plus Pool Cleaner
    Main Filter Pump - 1.5HP Pentair Whisperflo connected to Triton II Sand Filter
    Spa Pump - 2HP Pentair Whisperflo w/ 2HP Polaris Spa Air Blower
    Resilience PSC3 SWCG

  2. Back To Top    #2
    Texas Splash's Avatar
    Join Date
    Jun 2014
    Location
    South-Central Texas, Marion/San Antonio
    Posts
    12,960

    Re: Plaster in ground pool, brought my CH up from 140 to 270...am I good?

    The TFP recommended CH range for a plaster-SWG pool is 350-450. Yes, I would increase it, especially if you are lucky enough to have very soft fill water. Surfaces that start to become damaged from a lack of calcium (example leaching) can exhibit various signs of damage to include abnormal streaking, blistering, thinning appearance, etc. The calcium from within the pool's plaster is literally being stripped-away into the water. For leaching specifically, think of it as a chemical or liquid that is "seeping through" another substance as illustrated HERE.
    Pat (a.k.a. Texas Splash) ~ My Pool: Viking Fiberglass; 17,888 Gal; Waterway Supreme 2-sp/2-hp pump; Hayward Ctg filter; TF-100 w/ Speed Stir
    Vital Links: POOL SCHOOL, RECOMMENDED LEVELS, RECOMMENDED CHEMICALS, Poolmath Calculator, SLAM, Chlorine/CYA CHART.
    If you enjoyed your TFP experience, please consider donating to Support TFP!

  3. Back To Top    #3

    Join Date
    Apr 2016
    Location
    Youngsville, LA
    Posts
    272

    Re: Plaster in ground pool, brought my CH up from 140 to 270...am I good?

    Quote Originally Posted by Texas Splash View Post
    The TFP recommended CH range for a plaster-SWG pool is 350-450. Yes, I would increase it, especially if you are lucky enough to have very soft fill water. Surfaces that start to become damaged from a lack of calcium (example leaching) can exhibit various signs of damage to include abnormal streaking, blistering, thinning appearance, etc. The calcium from within the pool's plaster is literally being stripped-away into the water. For leaching specifically, think of it as a chemical or liquid that is "seeping through" another substance as illustrated HERE.
    I'm going to bump it up some more. What's the reasoning behind why plaster pools with SWGs need a range of 350-450 as opposed to plaster pools with bleach only needing 250-350?
    15k Gallon In Ground Saltwater Gunite Pool and Spa w/ Overflow
    Dolphin Nautilus Plus Pool Cleaner
    Main Filter Pump - 1.5HP Pentair Whisperflo connected to Triton II Sand Filter
    Spa Pump - 2HP Pentair Whisperflo w/ 2HP Polaris Spa Air Blower
    Resilience PSC3 SWCG

  4. Back To Top    #4
    Texas Splash's Avatar
    Join Date
    Jun 2014
    Location
    South-Central Texas, Marion/San Antonio
    Posts
    12,960

    Re: Plaster in ground pool, brought my CH up from 140 to 270...am I good?

    Much of that is based on research from experts in the field like "Chem Geek" who have offered descriptions such as this:
    The TDS, so salt level, also affects CSI where salt pools at 3000 ppm have around 0.2 units lower CSI all else equal. Our current Recommended Levels are still inconsistent and low in CSI for SWG pools where they should have an even higher CH for plaster because 1) the higher salt level has the CSI be 0.2 units lower and 2) the higher CYA recommendation has the CSI be 0.1 unit lower and 3) the lower TA has the CSI be 0.07 units lower while the higher pH target only has the CSI be 0.05 units higher.
    That was from THIS THREAD.

    Basically it's all tied-into the pool's CSI level.
    Pat (a.k.a. Texas Splash) ~ My Pool: Viking Fiberglass; 17,888 Gal; Waterway Supreme 2-sp/2-hp pump; Hayward Ctg filter; TF-100 w/ Speed Stir
    Vital Links: POOL SCHOOL, RECOMMENDED LEVELS, RECOMMENDED CHEMICALS, Poolmath Calculator, SLAM, Chlorine/CYA CHART.
    If you enjoyed your TFP experience, please consider donating to Support TFP!

  5. Back To Top    #5

    Join Date
    Aug 2010
    Location
    Dallas, TX
    Posts
    4,052

    Re: Plaster in ground pool, brought my CH up from 140 to 270...am I good?

    Ah, glad I read this thread. This is new info to me (I was gone for a long time - dang work gets in the way). I need to raise my CH!

    I have noticed my CSI will sometimes go out of range, but for the most part I've ignored it.
    Built in 1957 44,000 gallon in-ground, Wet Edge Primera Stone in Sky Blue, Intelliflo VF Pump, 600 lb. Pentair Triton II TR-100 Sand Filter, CircuPool RG 60 Plus SWG, TF-100 test kit
    If TFP has helped you, please click to SUPPORT TFP!

  6. Back To Top    #6

    Join Date
    Aug 2010
    Location
    Dallas, TX
    Posts
    4,052

    Re: Plaster in ground pool, brought my CH up from 140 to 270...am I good?

    I need 50-60 lbs of calcium chloride. Does this look like the right thing? This is about 1/4 the cost at Leslies.

    Snow Joe 50 lb. Re-Sealable Bag Calcium Chloride Crystals Ice Melter-MELT50CC - The Home Depot

    Or this, which is flakes...
    Vaporizer 50 lb. Calcium Flake Ice Melt Bag-VP-CF50BG - The Home Depot

    This one is a lot more, but they mention using it in pools
    Amazon.com : North American Salt 50850 Extreme 7300 Calcium Chloride Ice Melter, 50-Pound : Snow And Ice Melting Products : Patio, Lawn Garden

    Or any of them?
    Built in 1957 44,000 gallon in-ground, Wet Edge Primera Stone in Sky Blue, Intelliflo VF Pump, 600 lb. Pentair Triton II TR-100 Sand Filter, CircuPool RG 60 Plus SWG, TF-100 test kit
    If TFP has helped you, please click to SUPPORT TFP!

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •