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Thread: Draining Pool to Rid CYA and DE

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    Draining Pool to Rid CYA and DE

    Hello TFP'ers,

    We are emptying our 5600 gal. tiled pool tomorrow. We had a DE leak that has been fixed and cya levels over 400ppm. Other than hosing down the tiles, anything else we should do to prepare for refilling.
    Thank you.
    Ron (H2o) Burd

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    pabeader's Avatar
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    Re: Draining Pool to Rid CYA and DE

    Hope. Hope it doesn't pop out of the ground, that's about all I can think of. Maybe if you have some staining, now would be a good time to take care of it.
    Bob - INTEX 12x24 owner (not setup yet), 'New to me' Kreepy Krauly Sand Shark, Test kit: TF-100 w/Speed Stir

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    Re: Draining Pool to Rid CYA and DE

    Thanks Bob. Our fingers are crossed.
    Ron (H2o) Burd

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    Mod Squad zea3's Avatar
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    Re: Draining Pool to Rid CYA and DE

    You don't have to drain all the pool at once. If you are not sure how high the water table is drain about 1/2, refill and drain 1/2 again until you get the CYA where you want it. The DE should vacuum up.
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    Re: Draining Pool to Rid CYA and DE

    While the water is low, if you have a built-in pool light, don't forget to remove the light from its niche and spray any gunk/crud out that has accumulated back there. I had a lot of nastiness I removed when I drained my new to me pool last year.
    8,500gal plaster in-ground with attached spa, two floor drains, one skimmer. Chlorine, City Water.
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    Re: Draining Pool to Rid CYA and DE

    Quote Originally Posted by H2Oburd View Post
    Hello TFP'ers,

    We are emptying our 5600 gal. tiled pool tomorrow. We had a DE leak that has been fixed and cya levels over 400ppm. Other than hosing down the tiles, anything else we should do to prepare for refilling.
    Thank you.
    Wow - how did you let your CYA level get so high? That is extremely high. You are going to have to drain more than half the pool. Your pool is pretty small so it won't take much to refill.

    I have no idea the hazards of a pool popping out of the ground if you empty it. Maybe others can chime in on what to expect and how long you can go with it empty??? With a pool that size and CYA that high, I would drain 90% of it but be concerned about the pool floating. Good luck.
    36,000 gallon IG Gunite (40 x 20), 1.5 HP Hayward pump, Pentair Nautilus NS-48 DE filter, 2 skimmers, 12 - (2 x 20) Fafco Solar Panels (Goldline controller not hooked up yet), Hayward Swimpure Plus SWG, Blue Pearl Robot cleaner. New Dr. Wellness X-12 standalone Lifestyle Spa.

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    Mod Squad YippeeSkippy's Avatar
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    Re: Draining Pool to Rid CYA and DE

    I always get nervous about emptying pools in FL, just imagining all the ground water issues there (springs, lakes, etc) Is your pool plaster or fiberglass??

    Be careful and get it filled again quickly.
    Maddie :) 12K Fiberglass IG, Infinity 4000 automatic cover, SWCG, Hayward Sand Filter, Hayward 1.5 Pump, Doheny Discovery Robot, Savi Melody LED pool lights, outdoor speakers and other assorted doo-dads. Sundance Altamar Hot Tub.
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    Re: Draining Pool to Rid CYA and DE

    Quote Originally Posted by YippeeSkippy View Post
    I always get nervous about emptying pools in FL, just imagining all the ground water issues there (springs, lakes, etc) Is your pool plaster or fiberglass??

    Be careful and get it filled again quickly.
    +1

    I would be very concerned with the pool floating. Could you dig a small hole near the pool? See how deep you can dig before hitting water. I will bet it's only a few feet.
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    Re: Draining Pool to Rid CYA and DE

    One approach which is not commonly mentioned but effective, if you have a tarp or plastic much bigger than the pool in all directions, is the simultaneous pump and fill method (or tarp method). Place tarp/plastic on the water surface and overlapping onto the deck all around. Pump from below the cover and fill on top of the plastic/tarp at roughly equal rates. The water doesn't mix because the water you add presses the plastic to the pool walls creating a decent seal. There was a fantastic documentation of this in a thread (used for pumping a swamp) for a guy who didn't want to risk popping his shell/floating his liner. Here it is: https://www.troublefreepool.com/thre.../page3#p449932
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