Become a TFP Supporter Pool Math Forum Rules Pool School
Results 1 to 7 of 7

Thread: No problems at high CH should I lime soften?

  1. Back To Top    #1

    No problems at high CH should I lime soften?

    My pool looks great however the CH I tested was pretty high. The pool is perfectly sparkling clear blue with no issues except for high CH and CYA.

    Test results for my 20k plaster pool with SWCG, 1.5 hp pump, and cartridge filter.

    FC: 10
    CC: 0
    pH: 7.6
    TA: 120
    CH: 900
    CYA: 110
    Salt: 3400

    City fill water from southern California CH is 110.

    Should I be concerned about high CH? I was told before that high CYA is no problem for SWCG if FC is maintained. Only minor problem is that my SWCG spits out calcium deposits that I have to clean often. Considering Lime Softening to make cleaning the salt cell less often.

  2. Back To Top    #2
    Mod Squad JohnT's Avatar
    Join Date
    Apr 2007
    Location
    SW Indiana
    Posts
    9,089

    Re: No problems at high CH should I lime soften?

    Welcome to TFP!

    Have you considered reverse osmosis filtering? It may be available in your area.
    TFP Moderator
    20K Gallon 20X36 Vinyl Inground
    Hayward S244T Sand Filter with 1HP Whisperflo Pump. Liquidator C-201 and Solar Heat

  3. Back To Top    #3

    Re: No problems at high CH should I lime soften?

    I just searched the forum and found this nicpppardo-reverse-osmosis-t57161.html which says that there is no reverse osmosis service in the Los Angeles area which is where I am. Is lime softening the only option for my area then?

  4. Back To Top    #4
    Richard320's Avatar
    Join Date
    Jan 2010
    Location
    San Dimas, CA (LA County)
    Posts
    18,768

    Re: No problems at high CH should I lime soften?

    Quote Originally Posted by lithium3n
    I just searched the forum and found this nicpppardo-reverse-osmosis-t57161.html which says that there is no reverse osmosis service in the Los Angeles area which is where I am. Is lime softening the only option for my area then?
    Never heard of that.

    I just drain a few inches off to water the lawn and refill with the tap water that would have gone to the lawn. It also helps keep CYA levels down, so I have the luxury of using trichlor pucks when i leave town.
    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!

  5. Back To Top    #5

    Re: No problems at high CH should I lime soften?

    Quote Originally Posted by Richard320
    Quote Originally Posted by lithium3n
    I just searched the forum and found this nicpppardo-reverse-osmosis-t57161.html which says that there is no reverse osmosis service in the Los Angeles area which is where I am. Is lime softening the only option for my area then?
    Never heard of that.

    I just drain a few inches off to water the lawn and refill with the tap water that would have gone to the lawn. It also helps keep CYA levels down, so I have the luxury of using trichlor pucks when i leave town.
    The lime softening method is mentioned on the other pool forum here http://www.poolforum.com/pf2/showthread ... nt-Process and mentioned here in the deep end section. It would take quite a bit of draining to get my CH down to ideal levels, based on my calculation 75% drain and refill [ x*900 ppmCH + (1-x)*110 ppmCH = 300 ppmCH, where x = fraction of original pool water and (1-x) = fill water, x = 0.24 ]

  6. Back To Top    #6
    Richard320's Avatar
    Join Date
    Jan 2010
    Location
    San Dimas, CA (LA County)
    Posts
    18,768

    Re: No problems at high CH should I lime soften?

    You can throw those ideal targets right out the window living here.

    I will tell you from years of balancing this mess, 900 CH is about the practical limit to keep CSI neutral, and it's not easy. I gain about 25 ppm per week when its hot and windy. for me, draining 3" of water is 5%. It just sort of holds things steady. The real progress comes if/when it rains. I divert a downspout into the pool. The water is only filthy the first day, after that it's not a big problem to just run the filter in the spa/settling tank and clear it in ten minutes.

    [center:28e9f0ve][/center:28e9f0ve]
    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!

  7. Back To Top    #7

    Re: No problems at high CH should I lime soften?

    Quote Originally Posted by Richard320
    You can throw those ideal targets right out the window living here.

    I will tell you from years of balancing this mess, 900 CH is about the practical limit to keep CSI neutral, and it's not easy. I gain about 25 ppm per week when its hot and windy. for me, draining 3" of water is 5%. It just sort of holds things steady. The real progress comes if/when it rains. I divert a downspout into the pool. The water is only filthy the first day, after that it's not a big problem to just run the filter in the spa/settling tank and clear it in ten minutes.

    [center0zlyi76][/center0zlyi76]
    Last year around this time I had 600 CH, so I gained about 300, so I'm getting about 25 ppm per month. I don't know if I should wait until problems occur or do something soon. For the time being it's perfectly fine. The rain water collection is a nifty idea which I'll consider doing next winter.

Posting Permissions

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