Become a TFP Supporter Pool Math Forum Rules Pool School
Results 1 to 4 of 4

Thread: Should I adjust my Calcium Hardness?

  1. Back To Top    #1

    Join Date
    Apr 2016
    Location
    Youngsville, LA
    Posts
    272

    Should I adjust my Calcium Hardness?

    Current setup is a 15k gallon SWG gunite/plaster pool (built in 08-09) and spa. Current CH level is 170. Kinda confused at all the different numbers/recommendations for CH. Should I bump this up a little, and if so what range should I shoot for 200-250? The previous homeowners left a 5 gallon bucket of Hardness Plus which makes me assume that the pool's CH levels must have stayed on the lower side.
    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
    12,941

    Re: Should I adjust my Calcium Hardness?

    The CH range for your SWG pool is 350-450. It would be in your best interest to stay close to that minimum end of the range to protect your pool's plaster surfaces. Some people who live in areas that have hard water see their CH rise quickly from refilling. The links below in my sig can help you with that as well. If your area receives so much rain that water exchange happens quite frequently, or you pool has a constant leak, that can result in CH lowering quite rapidly. Hope that helps.
    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: Should I adjust my Calcium Hardness?

    Quote Originally Posted by Texas Splash View Post
    The CH range for your SWG pool is 350-450. It would be in your best interest to stay close to that minimum end of the range to protect your pool's plaster surfaces. Some people who live in areas that have hard water see their CH rise quickly from refilling. The links below in my sig can help you with that as well. If your area receives so much rain that water exchange happens quite frequently, or you pool has a constant leak, that can result in CH lowering quite rapidly. Hope that helps.
    Well our pool isn't that big beings it's only 15k gallons and it tends to rain quite often in South Louisiana, therefore every so often I do have to waste from time to time to lower it back to the proper skimming level. Maybe that's why it tends to stay on the low side for the CH. I'll try raising it up a bit and see what happens. Last thing I want is for the plaster surface to get messed up due to low CH levels.
    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
    12,941

    Re: Should I adjust my Calcium Hardness?

    I think that's a good call. I forgot to mention the backwashing, so yes that would definitely impact your CH (and CYA) levels. Have a nice weekend.
    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!

Posting Permissions

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