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

Thread: maybe they didn't use enough DE at start up?

  1. Back To Top    #1

    Join Date
    Jan 2014
    Location
    Buckeye AZ
    Posts
    807

    maybe they didn't use enough DE at start up?

    New pool opened 3/14, so the PB added DE to the filter on 3/12 maybe. Brand new hayward filter. He set the full speed pressure gauge at the top.

    It's six weeks later now, and we still have a lot of dust accumulating on the walls and floor. Secondly, the full speed pressure is still where it was on day one.

    So I'm wondering if maybe he didn't add enough DE to really cover the grids on start up, and the water isn't really filtering. How can you tell? Surely the pressure should be up a little by now. If I just add a cup of DE to the skimmer, would that hurt? How can you tell when you've added too much?
    10,500 gal IG, Topaz Pebble, auto-level
    Hayward DE filter, 2HP Ecostar VSP, ProLogic PS-4, GVA actuators
    Cal Pools Wave Force Plus (wall return jets plus 2 floor pop-ups), Venturi Skimmer
    Water sheer, 2 wok pots, bubbler stem on the baja step
    ColorLogic Mutlicolor LED lamp. Taylor 2006+speed stir

  2. Back To Top    #2
    frustratedpoolmom's Avatar
    Join Date
    May 2007
    Location
    SWSuburban Chicago, IL
    Posts
    11,965

    Re: maybe they didn't use enough DE at start up?

    You can try adding a cup or 2. When it's too much the pressure will increase significantly, and the flow from the return will virtually stop. With 2 cups you should see a pressure increase. If its malfunctioning and not filtering properly - you might see some blow through the returns.
    Helpful links: Pool School; CYA/Chlorine Chart
    24' round AG pool, 52" high, Raypak heater; Waterway 2 spd Pump;
    150 Sq ft. Clearwater Cartridge Filter; Former and DISSATISFIED "Pool Frog" owner
    http://www.PerfectlyClearPoolService.com

  3. Back To Top    #3

    Join Date
    Jan 2014
    Location
    Buckeye AZ
    Posts
    807

    Re: maybe they didn't use enough DE at start up?

    If I do add enough that the pressure jumps like 3-5 psi, I suppose I could just backwash for a bit. I haven't had to do anything like that yet, so I'm not sure how much I'll lose at backwash.
    10,500 gal IG, Topaz Pebble, auto-level
    Hayward DE filter, 2HP Ecostar VSP, ProLogic PS-4, GVA actuators
    Cal Pools Wave Force Plus (wall return jets plus 2 floor pop-ups), Venturi Skimmer
    Water sheer, 2 wok pots, bubbler stem on the baja step
    ColorLogic Mutlicolor LED lamp. Taylor 2006+speed stir

  4. Back To Top    #4
    frustratedpoolmom's Avatar
    Join Date
    May 2007
    Location
    SWSuburban Chicago, IL
    Posts
    11,965

    Re: maybe they didn't use enough DE at start up?

    Once you backwash you add back 80% of the original fill.
    Helpful links: Pool School; CYA/Chlorine Chart
    24' round AG pool, 52" high, Raypak heater; Waterway 2 spd Pump;
    150 Sq ft. Clearwater Cartridge Filter; Former and DISSATISFIED "Pool Frog" owner
    http://www.PerfectlyClearPoolService.com

Posting Permissions

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