Become a TFP Supporter Pool Math Forum Rules Pool School
Results 1 to 5 of 5

Thread: Any tricks of the trade for drain / fill with a tarp?

  1. Back To Top    #1

    Join Date
    Mar 2015
    Location
    Indiana
    Posts
    79

    Any tricks of the trade for drain / fill with a tarp?

    Tomorrow I will be swapping out some water. We are on a well so because of metals in the water I will be having at least two 4,000 trucks brought in. Obviously we have a fiberglass pool and the installer and manufacturer stated not to drain water past the skimmer. That gets me down to about 10" below the top edge of the pool. My plan is to drain down, place the tarp on top, and fill with the first truck. Then drain down again to bottom of skimmer and bring the next truck in. If the water guy has time I'll do a third, otherwise just stick with the 8,000. Then pull out the tarp and presto (hopefully). I dug down and got ground water at about 22" so I'm hoping going down 10" won't be a problem. I found a couple threads on the topic, one that was really helpful with pics, but had a few more questions.

    Is there any problem filling a fiberglass pool to the top? I do not have concrete coping, just the top edge of fiberglass. The skimmer opening will be blocked off with the tarp.

    Are there any trips to using the tarp? It seems pretty straight forward, but I know how that always ends up....I'm assuming as long as no one is doing cannon balls into the water I won't have problems with the tarp going to the bottom of the pool? I got a 60x40 tarp.


    Thanks for any advice available!
    17x41 Sun Fiberglass Pool 21,500 gallons. Jandy 1hp pump, Hayward Top Mount Sand Filter, Coverstar Auto Cover.

  2. Back To Top    #2
    JasonLion's Avatar
    Join Date
    May 2007
    Location
    Silver Spring, MD
    Posts
    37,879

    Re: Any tricks of the trade for drain / fill with a tarp?

    I really don't recommend using a tarp. While it is possible, it is fairly difficult to keep control of the tarp and relatively dangerous if anyone falls in. For all the extra effort, you get just a tiny improvement in efficiency.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
    Creator of PoolMath and Pool Calculator. Other handy links: Support this site, TF Test Kits, Pool School

  3. Back To Top    #3
    Patrick_B's Avatar
    Join Date
    Jun 2011
    Location
    Midland TX
    Posts
    15,001

    Re: Any tricks of the trade for drain / fill with a tarp?

    I cannot wrap my mind around how you get much benefit from it. Not in practice anyway.
    TFP Moderator
    Essential Links:
    ABC's Of Pool Chemistry, Test Kits, SLAM Your Pool
    28K Gal IG FreeForm, CLI Quartz, Pentair 36"SF & VS Pump, Dolphin M5, Rheem

  4. Back To Top    #4

    Join Date
    Mar 2015
    Location
    Indiana
    Posts
    79

    Re: Any tricks of the trade for drain / fill with a tarp?

    It seemed to make sense when I bought it (of course). My thinking was this - the 4000 gallons is roughly 20% of my volume. Also assuming my cya is in the 400 range, it may be lower.

    If I drain down and add one truck, that would dilute the water by 20% making the cya level 320. Then drain down, add second truck, dilute again by 20% for cya of 256. If able to do a third truck would take it down to 205.

    If I use the tarp and do 40% at once that would dilute the cya from initial of 400 to 240, slightly better than without tarp. However if I can get the third truck in with the tarp that would be 60% and take the cya down 160.

    I don't know if that's how it would actually end up working, just what it seems to be. It sounds like the slight improvement by keeping the water separate might not be worth that added hassle of messing with the tarp?
    17x41 Sun Fiberglass Pool 21,500 gallons. Jandy 1hp pump, Hayward Top Mount Sand Filter, Coverstar Auto Cover.

  5. Back To Top    #5
    Mod Squad jblizzle's Avatar
    Join Date
    May 2010
    Location
    Tucson, AZ
    Posts
    37,389

    Re: Any tricks of the trade for drain / fill with a tarp?

    Quote Originally Posted by heugeneo View Post
    It sounds like the slight improvement by keeping the water separate might not be worth that added hassle of messing with the tarp?
    Exactly. Yes, using it would allow you to lower the CYA slightly more. But with the added expense of the tarp, hassle of trying to keep in it place, and the risk of something going very wrong if someone fell in.
    Jason, TFP Moderator
    18k IG pebblesheen pool, Hayward ProLogic P4 w/ T-15 SWG, Pentair 1HP 2-speed Superflo, Hayward 6020 DE filter
    500 sqft Heliocol solar panels, ThePoolCleaner, TF-100 test kit w/ SpeedStir
    Pool School + Test Kit + PoolMath = A TROUBLE FREE POOL
    If you found TFP helpful and we saved you money ... Become a TFP Supporter!

Posting Permissions

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