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Thread: Solar Cover Evaporation

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    Solar Cover Evaporation

    I was just curious on peoples experience with solar covers. I still lose about a sliver of water a day. My cover isn't cut to fit the ladders. So it isn't totally covering the surface.
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    Mod Squad JVTrain's Avatar
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    Re: Solar Cover Evaporation

    It should reduce evaporation by quite a bit. More on windier, drier days. Are you noticing less than before cover?

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    Re: Solar Cover Evaporation

    Yes way less. Just like 10th an inch is still evaporating a day.

    - - - Updated - - -

    I just didn't know if for some people it stops it completely.
    16x32X8 Vinyl liner 21,000 gal.
    Hayward Pro Series S220T 250lb. sand filter hard plumbed
    Taylor K-2006 Test

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    Re: Solar Cover Evaporation

    Probably 10th an inch in 2 days.
    16x32X8 Vinyl liner 21,000 gal.
    Hayward Pro Series S220T 250lb. sand filter hard plumbed
    Taylor K-2006 Test

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    JoyfulNoise's Avatar
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    Re: Solar Cover Evaporation

    I just go by the sound of my autofill. With my cover on, it is quiet and there is no sound at all. When my cover is off, it sounds like a toilet bowl that is constantly running. Covers work AMAZINGLY well at cutting down on evaporation.
    Matt
    16k IG PebbleTec pool, 650gal spa, spillway and waterfall, 3HP IntelliFlo VS / 1.5HP WhisperFlo, Pentair QuadDE-100 filter, IC40 SWCG, MasterTemp 400k BTU/hr NG heater, KreepyKrauly suction-side cleaner Dolphin S300i robot, EasyTouch controls, city water, K-1001, K-2006 and K-1766 test kits, Mannitol test for borates

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    Mod Squad pooldv's Avatar
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    Re: Solar Cover Evaporation

    +1 to that and reducing FC consumption and PH rise!
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    JoyfulNoise's Avatar
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    Re: Solar Cover Evaporation

    Quote Originally Posted by pooldv View Post
    +1 to that and reducing FC consumption and PH rise!
    I've had mine off for over a week now. I left it on too long when the day time temps got high and nearly shot my pool water past 96F. It was like a bathtub.

    I haven't had a chance to put it back on because everyone is swimming in it.
    Matt
    16k IG PebbleTec pool, 650gal spa, spillway and waterfall, 3HP IntelliFlo VS / 1.5HP WhisperFlo, Pentair QuadDE-100 filter, IC40 SWCG, MasterTemp 400k BTU/hr NG heater, KreepyKrauly suction-side cleaner Dolphin S300i robot, EasyTouch controls, city water, K-1001, K-2006 and K-1766 test kits, Mannitol test for borates

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    Mod Squad pooldv's Avatar
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    Re: Solar Cover Evaporation

    Nice! Water hit 88 today, it'll probably be coming off for good in a day or two. As soon as the lows move up from the lower 60s to the lower 70s.
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    JoyfulNoise's Avatar
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    Solar Cover Evaporation

    Yeah. Our overnight lows are still hitting the high 60's with daytime temps near 100F. So my water temps average 86-88F and then overnight the air temp hits 68-70F.

    So I've got a 20F temperature differential and the relative humidity here is about 10%....suffice it to say my autofill runs A LOT at night

    I wake up early in the AM and open the blinds just to make sure all the water hasn't evaporated away...
    Matt
    16k IG PebbleTec pool, 650gal spa, spillway and waterfall, 3HP IntelliFlo VS / 1.5HP WhisperFlo, Pentair QuadDE-100 filter, IC40 SWCG, MasterTemp 400k BTU/hr NG heater, KreepyKrauly suction-side cleaner Dolphin S300i robot, EasyTouch controls, city water, K-1001, K-2006 and K-1766 test kits, Mannitol test for borates

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    Re: Solar Cover Evaporation

    I just got me a blue solar cover today and threw it on as the sun went down. Should I be taking it off during the day, or only when we want to swim? My primary concern is heating the water, not reducing evaporation. Though that'll be nice too.

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    Solar Cover Evaporation

    Quote Originally Posted by camueller View Post
    I just got me a blue solar cover today and threw it on as the sun went down. Should I be taking it off during the day, or only when we want to swim? My primary concern is heating the water, not reducing evaporation. Though that'll be nice too.
    If you need to heat the water then just leave it on until you swim and make sure it goes back on before the sun goes down. If no one uses the pool, then just plan to pull it off for a couple of hours each week during the day to let the water get some UV and outgas any CCs that might be hanging around.
    Matt
    16k IG PebbleTec pool, 650gal spa, spillway and waterfall, 3HP IntelliFlo VS / 1.5HP WhisperFlo, Pentair QuadDE-100 filter, IC40 SWCG, MasterTemp 400k BTU/hr NG heater, KreepyKrauly suction-side cleaner Dolphin S300i robot, EasyTouch controls, city water, K-1001, K-2006 and K-1766 test kits, Mannitol test for borates

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