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Thread: best time of day to test: new pool setup

  1. Back To Top    #1

    Join Date
    May 2013
    Chandler Arizona

    best time of day to test: new pool setup

    I just setup new 18 x 9 52 intex. with 1200 gph sand filter and SWG. I added salt 105 lbs and liquid stabilizer( cyanuric acid) 1/2 gallon. I live in arizona and was wondering when the best time is to run my SWG and test water. The temps here are already 110 . What is the most efficient way to create my chlorine. Should I run at high sun or at night? and then what time should I test? I know UV kills chlorine.
    Intex Ultra Frame 18 x 9 x 52 rectangle. 4545 Gallons.
    12 in Krystal Clear™ Sand Filter Pump w/ GFCI.
    Krystal Clear Saltwater System™ w/ GFCI.
    TF-100 Taylor testing.
    K-1000 Taylor testing.

  2. Back To Top    #2

    Join Date
    Jun 2011
    Northeast Ohio USA

    Re: best time of day to test: new pool setup

    I would suggest running SWG overnight. This could help "cool" the water and is less likely to interfere with normal pool use.

    I like to test late in the evening (unless I am fighting algea or preparing for a party), as this is when I would expect FC to be at its lowest levels.
    Vinyl In-Ground (vinyl) - about 21600 gallons (18x32 Grecian)
    Hayward DE (model 7220?) filter with Multiport valve
    Challenger Hi Flo Pump (3/4 HP)
    Intex SWG
    leaky/non-functioning Raypak Versa Natural Gas Heater *removed*

  3. Back To Top    #3
    Mod Squad jblizzle's Avatar
    Join Date
    May 2010
    Tucson, AZ

    Re: best time of day to test: new pool setup

    You need to run it long enough so that the FC never drops too low ... that can either be at night or during the day. Likely it would be safest to be running during the day and then you just need to verify that the FC did not drop too low overnight before the SWG comes back on.

    You can test any time after the pump has been on for an hours and make sure the pump runs for an hour after you add any chemicals. The CYA test is best done in sunlight: extended-test-kit-directions-t25081.html#p206397

    EDIT: Although shortdog raises a good point ... don't the Intex SWG say not to run when the pool is occupied? That would make running at night less hassle.
    Jason, TFP Moderator
    18k IG pebblesheen pool, Hayward ProLogic P4 w/ T-15 SWG, Pentair 1HP 2-speed Superflo, Hayward 6020 DE filter
    500 sqft Heliocol solar panels, ThePoolCleaner, TF-100 test kit w/ SpeedStir
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