Become a TFP Supporter Pool Math Forum Rules Pool School
Results 1 to 4 of 4

Thread: Best time of day to test and add chemicals

  1. Back To Top    #1
    DigbyAllen's Avatar
    Join Date
    Aug 2012
    Location
    Westchester, NY
    Posts
    113

    Best time of day to test and add chemicals

    I've searched on the forum and pool school and can't find a consensus.

    When is the best time to test the pool water and add chemicals? Morning? Evening? Before swimming? After swimming? When the pump is running or does it matter? Is consistency more important than time of day?

    I've been testing daily but at random times. Depending on my schedule, sometimes first thing in the morning, but usually late in the evening. But in the evening my pump isn't running because I only run it during the day.

    I figured it is best to add chlorine (I'm using bleach) in the evening rather than when the sun is out to try to keep the FC level up as long as possible. BTW I did an OCLT and my FC was 4.0 at night, and 3.5 in the morning, so that looks good. CC was zero in both cases.

    Thanks.
    Jim
    Intex 15' x 42" -- 4,000 gallons
    installed August 2012
    Intex 2650 sand filter, Hayward skimmer
    TF-100 test kit, TFP method

  2. Back To Top    #2
    Mod Squad woodyp's Avatar
    Join Date
    Apr 2010
    Location
    East Texas
    Posts
    8,997

    Re: Best time of day to test and add chemicals

    Evening is preferred........and let the pool circulate for half an hour or so afterwards to mix in. That way.........you have the max disinfectant sitting in it overnight with no loss to sunlight.
    16x32x52" Steel Cornelius Miramar AGP Vinyl liner 13,100 gal. Buried 2 ft.
    2 Speed Hayward Power-Flo Matrix 85 g.p.m. 22" 250lb. sand filter hard plumbed
    Pool Rover Jr., Pool Blaster Max, Diver Dave TF100 Test Kit/Speed Stir
    Margaritaville Frozen Concoction Maker, Liqour Chiller, & Drink Mixer & Party Tub----Collect 'um all!

  3. Back To Top    #3
    Mod Squad jblizzle's Avatar
    Join Date
    May 2010
    Location
    Tucson, AZ
    Posts
    37,389

    Re: Best time of day to test and add chemicals

    Consisetency is more important.
    The pump needs to be on 1 hour before you test and 1 hour after you add any chemicals.
    Evening is best in my opinion so that the raised FC can act on anything in the pool and not be lost to the sun.

    If you are going to have heavy use, it is certainly a good idea to bump up the FC before and/or after to help take care of whatever was added while swimming.
    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
    Pool School + Test Kit + PoolMath = A TROUBLE FREE POOL
    If you found TFP helpful and we saved you money ... Become a TFP Supporter!

  4. Back To Top    #4
    DigbyAllen's Avatar
    Join Date
    Aug 2012
    Location
    Westchester, NY
    Posts
    113

    Re: Best time of day to test and add chemicals

    Thanks for the help guys.
    Jim
    Intex 15' x 42" -- 4,000 gallons
    installed August 2012
    Intex 2650 sand filter, Hayward skimmer
    TF-100 test kit, TFP method

Posting Permissions

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