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Thread: Greenhouse effect?

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    Greenhouse effect?

    For those of you who have an automatic pool cover (mine is from PoolCoversInc), have you heard of the Green House effect?

    A pool service guy (used by my pool builder) said that if the pool cover was to remain closed for about a week (7 days when on vacation) and the temperature is above the 80's and 90's, there will be this greenhouse effect where all the gasses are trapped under the cover and will cause algae bloom - even when FC and pH are within the suggested ppm levels (FC will be coming from Trichlor tablets and pH stays between 7.2 ppm to 7.8 ppm within a week).

    In the past 2 years when we went on vacation for about 4 to 5 days, the cover was closed and did not get algae. We will be going for 7 days this time, two more days, and would like to know if there is something I need to know and do something about.
    14,000 gals; IG gunite - Wet Edge Primera Stone finish; Sta-Rite/Pentair Intelliflo variable speed; Sta-Rite/Pentair system3 S7M400 cartrige; Sta-Rite Max-E-Therm 400 heater; (Pentair Rainbow 320 Chlorinator- for vacation use only); built-in automatic pool cover; Trident II UV system (on recall not currently used); built 10/31/2012; TFT-100; MX8 cleaner

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    Mod Squad JVTrain's Avatar
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    Re: Greenhouse effect?

    Simply not true. If FC is maintained properly, you will not get algae. CC may build up as the pool is not being exposed to UV light to help burn them off but just the pool being covered will not cause algae.

    Greenhouse effect is a real thing, but has nothing to do with pools or algae.

    The Greenhouse Effect | A Student's Guide to Global Climate Change | US EPA
    Joel - TFP Moderator - Minnesota - **Become a TFP Supporter!** Helpful Links: ABCs of Pool Water Chemistry - SLAM Procedure - Chlorine/CYA Chart
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    Re: Greenhouse effect?

    Always a good idea to uncover a pool every so often. The water likes to breathe.

    Rather than worry about a "greenhouse affect" just remember that UV light is important to diminish CC's in your pool and the more you keep it covered, the more cc's you accumulate.......that's bad.

    Can you leave it covered for 7 days? I think so but you just never know.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
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    Re: Greenhouse effect?

    Quote Originally Posted by duraleigh View Post
    Always a good idea to uncover a pool every so often. The water likes to breathe.

    Rather than worry about a "greenhouse affect" just remember that UV light is important to diminish CC's in your pool and the more you keep it covered, the more cc's you accumulate.......that's bad.

    Can you leave it covered for 7 days? I think so but you just never know.
    I think that if the pool service guy will come in the third and the sixth day to check on the FC and pH, he would have to open the cover for maybe about 15 minutes each time. Would you think that would be enough to release the accumulated CC's and other gases?

    - - - Updated - - -

    Quote Originally Posted by JVTrain View Post
    Simply not true. If FC is maintained properly, you will not get algae. CC may build up as the pool is not being exposed to UV light to help burn them off but just the pool being covered will not cause algae.

    Greenhouse effect is a real thing, but has nothing to do with pools or algae.

    The Greenhouse Effect | A Student's Guide to Global Climate Change | US EPA
    Got it, thanks! I just now have to be concerned with the CC.
    14,000 gals; IG gunite - Wet Edge Primera Stone finish; Sta-Rite/Pentair Intelliflo variable speed; Sta-Rite/Pentair system3 S7M400 cartrige; Sta-Rite Max-E-Therm 400 heater; (Pentair Rainbow 320 Chlorinator- for vacation use only); built-in automatic pool cover; Trident II UV system (on recall not currently used); built 10/31/2012; TFT-100; MX8 cleaner

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