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Thread: which cover to get to slow FC loss

  1. Back To Top    #1

    Join Date
    Oct 2010
    Houston, TX

    which cover to get to slow FC loss

    Was going to buy a cover for my spa to slow FC loss when I go on a week vacation for a month. Is a black solar cover (the one with the bubbles) ok, or should I get something else? Will black slow loss more than blue or clear?

    Also, I have a freeform spa, and was wondering if I can cut one of those covers with scissors to the shape I want (never seen a solar cover, so not sure).
    15k gunite pool. Intelliflo VF. Autopilot SWG.
    2k separate spa with waterfall (ie: pain in the rear maintaining a separate body of water). 2HP Hayward Tristar pump.

  2. Back To Top    #2
    Mod Squad Bama Rambler's Avatar
    Join Date
    Jun 2009
    SouthWest Alabama

    Re: which cover to get to slow FC loss

    You can cut it with a stout pair of scissors. or a sharp knife. I have clear and it doesn't affect the FC loss that I can tell. I would go with a black cover if slowing FC loss was my goal.
    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

  3. Back To Top    #3

    Join Date
    Mar 2007
    San Rafael, CA USA

    Re: which cover to get to slow FC loss

    It's not so much the color that matters, but the opacity. If light does not shine through it, then that will prevent the FC from breaking down. A black cover will absorb light and tend to heat the surface of the pool which with circulation can provide some heating to the pool whereas a white cover would reflect the light and tend to prevent the pool from getting warmer from the sun so might be more useful in a place like Arizona to prevent evaporation, but to keep the pool from getting too hot too quickly.

    The clear and blue covers still let light through (the blue somewhat less than the clear). Again, get something that you cannot see through. Hold it up to a light or the sun and if you can't see the light at all or it's very dim then that's the best. The electric automatic safety cover on my own pool is mostly opaque, but does let a little bit of light through. Mostly though, it cuts down the FC loss significantly.
    16,000 gallon outdoor in-ground 16'x32' plaster pool; Pentair Intelliflo VF pump; Pentair IntelliTouch i9+3s control system; Jandy CL-340 square foot cartridge filter
    12 Fafco solar panels; Purex Triton PowerMax 250 natural gas heater (200,000 BTU/hr output); automatic electric pool safety cover; 4-wheel pressure-side "The Pool Cleaner"

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