Become a TFP Supporter Welcome to our new server and new forum software. Pool School
Results 1 to 7 of 7

Thread: Losing water with winter cover on

  1. #1
    Senior Member
    Join Date
    Jul 2007
    Location
    Florida
    Posts
    308

    Losing water with winter cover on

    We are in FL, so we don't drain any water for closing. We have a solid winter cover on and a leaf net cover over that. We need to maintain the water level so that we can run the pump during nights when it does freeze. But what is happening is that water soaks through the winter cover and evaporates faster than any kind of evaporation I usually get in the summer months. I am losing like 4 inches of water a week and constantly have to top off to ensure I have enough water to run the pump if it freezes. Anyone else ever have this problem? I don't remember it happening before, so maybe my winter cover has reached the end of its lifespan?
    Sue

    18' round Sharkline Matrix AGP / 8600 Gal. / sand filter / Aqua Trol SWG
    Pool owner since 2001. Thanks to TFP for helping me convert off Baquacil after six years!

  2. #2
    Member
    Join Date
    Oct 2007
    Location
    Philadelphia, PA
    Posts
    86
    I'm still fairly new at this, but it sounds to me that you have a leak in the pool, not the cover. Even with a huge hole in the cover, there would less evaporation than with no cover. Also, it must be somewhat cooler now than it was in the summer which would also decrease the evaporation rate.
    11x27 in ground, vinyl pool
    ~12,500 gal
    PAC FAB (Pentair) Pinnacle 3/4 hp pump
    Pentair 24 sq ft DE filter
    One skimmer, one return (no main drain)

  3. #3
    Senior Member
    Join Date
    Jul 2007
    Location
    Florida
    Posts
    308
    I don't think the pool has a leak. If that were the case we would have seen the water level dropping before we covered it and it wasn't. I checked all around the filter and hoses and nothing is wet. My husband had a look around and he came up with the theory that the winter cover is wicking water out of the pool.
    Sue

    18' round Sharkline Matrix AGP / 8600 Gal. / sand filter / Aqua Trol SWG
    Pool owner since 2001. Thanks to TFP for helping me convert off Baquacil after six years!

  4. #4
    Senior Member In the Industry

    Join Date
    Apr 2007
    Location
    Raleigh, NC
    Posts
    21,584
    I think your husband's on the right track. Allowing the water to "wick" up into the cover will certainly speed up evaporation.....apparently quite dramatically.

    Is the solid cover on there to support the leaf net or does it have another purpose? If it's primary function is to support the net, a solar cover will do the same thing and actually reduce evaporation considerably. That said, it's probably cheaper to let it evaporate than to purchase a solar cover.
    Dave S.
    Site Owner 42k vinyl and concrete pool, 1.5hp pump, 140gpm filter, No SWG
    TFTestkits owner
    TFTestkits , PoolMath , Pool School

  5. #5
    Senior Member
    Join Date
    Jul 2007
    Location
    Florida
    Posts
    308
    The solid cover is there because we have always used one... LOL. The leaf net is a new addition this year. We never used that before. I'm in Florida, where it could be dipping down in the 20's one night and be in the 80's 2 days later (like this week!). The trees get very confused the first several months of the year. There is a lot of pollen and those crumbly things that the oak trees drop. We have a lot of blackjack oaks and they make a huge mess. In the past the winter cover gets so loaded with leaf sludge that it is hard to siphon off before opening, so I decided to try the leaf net this time. I think just a leaf net and solar cover would pass far too much mess into the water.

    Anyway, the water loss has not been happening like it did those first few weeks after we covered it. Maybe having a layer of leaves on there is cutting down the wicking and evaporation.
    Sue

    18' round Sharkline Matrix AGP / 8600 Gal. / sand filter / Aqua Trol SWG
    Pool owner since 2001. Thanks to TFP for helping me convert off Baquacil after six years!

  6. #6
    Administrator JasonLion's Avatar
    Join Date
    May 2007
    Location
    Silver Spring, MD
    Posts
    34,610
    Do you have a cover pump? With a cover pump any water that leaks through the cover gets pumped out of the pool.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
    TFP Admin. Creator of PoolMath and Pool Calculator. Other handy links: Support this site, TF Test Kits, Pool School

  7. #7
    Senior Member
    Join Date
    Jul 2007
    Location
    Florida
    Posts
    308
    No cover pump. We have always left the water on the cover (I think that's what its instructions said to do) and then we siphon with a hose right before we open it.
    Sue

    18' round Sharkline Matrix AGP / 8600 Gal. / sand filter / Aqua Trol SWG
    Pool owner since 2001. Thanks to TFP for helping me convert off Baquacil after six years!

Posting Permissions

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