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

Thread: Total Dissolved Solids questions...

  1. Back To Top    #1

    Join Date
    Mar 2013
    Location
    Cayman Islands
    Posts
    30

    Total Dissolved Solids questions...

    The pool I care for has not been emptied in at least five years. I have no way of testing for TDS. I am concerned about a buildup of cyuranic acid from the tri-chlor I use. No way of testing for that either. About once a week I dump a small amount of the water and refill.
    What is the common wisdom concerning TDS, Cyuranic Acid, etc.? Am I doing enough, or should I persude the owner to let me empty the pool at some point and start fresh?

    Thanks for your help!
    46,000 gallon in ground concrete/crystal crete, filter is Pentair Pack Fab 60 DE, freshwater.
    2hp pump. Flow Rate ? 4 return jets, two of which are closed due to a leak in the plumbing
    Water is replaced/replentished using RO water

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

    Re: Total Dissolved Solids questions...

    TDS isn't a serious concern, though the individual things that make it up such as CYA or salt can be an issue.

    Any idea how much water you replace each week and how much trichlor you use?
    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

    Join Date
    Mar 2013
    Location
    Cayman Islands
    Posts
    30

    Re: Total Dissolved Solids questions...

    Out of 46,000 gallons, I'd say about 500 or so. I use about two 3 inch trichlor pucks per day on average. Am still waiting on an order of chemicals (since September!) so I have no di-chlor to change things up.
    The pool is pretty close to the ocean, so we get a fair amount of salt spray when the wind is right. What will the salt do to my pool chemistry?

    Thanks!
    46,000 gallon in ground concrete/crystal crete, filter is Pentair Pack Fab 60 DE, freshwater.
    2hp pump. Flow Rate ? 4 return jets, two of which are closed due to a leak in the plumbing
    Water is replaced/replentished using RO water

  4. Back To Top    #4
    Mod Squad Bama Rambler's Avatar
    Join Date
    Jun 2009
    Location
    SouthWest Alabama
    Posts
    22,345

    Re: Total Dissolved Solids questions...

    Adding 2 pucks per day is raising the CYA about 1.5 ppm per day or 9 ppm per week. In order to counteract that by water replacement you need to replace 6000 gallons per week.

    Adding Di-chlor will only make the issue worse, not better.

    Since you care for pools you really should have a kit that tests for all the common parameters. Especially CYA. You can probably get a K-2006C shipped over there.
    Dave J. TFP Moderator
    24' x 52" Round AGP. 2hp/¼hp SPL Power-Flo 2-speed pump. 200sqft Waterway Cartridge Filter. 45MHP2(3GPD) Stenner Peristaltic Pump
    Pool School ----- Pool Math ----- TF-Test Kit

Posting Permissions

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