Become a TFP Supporter Pool Math Forum Rules Pool School
Results 1 to 5 of 5

Thread: Chlorine shelf life / expiration

  1. Back To Top    #1

    Join Date
    Mar 2017
    Location
    Houston, TX
    Posts
    86

    Chlorine shelf life / expiration

    Hello, our new pool is 2+ weeks old. I just ditched our chlorine tabs for liquid chlorine.

    I've purchased three jugs from Home Depot and Walmart so far and am wondering how long they would stay effective? How much do you all keep on hand at one time?

    Thanks!
    First time pool owner
    21K IG; quartz plaster finish
    Pentair 1HP Whisperflo pump; Pentair Clean and Clear Plus cartridge filter; Pentair Mastertemp 400K BTU heater
    Polaris 280; Completed Feb. 2017

  2. Back To Top    #2
    Mod Squad Texas Splash's Avatar
    Join Date
    Jun 2014
    Location
    South-Central Texas, Marion/San Antonio
    Posts
    17,347

    Re: Chlorine shelf life / expiration

    I generally only buy bleach that I know I will use in the next week or two. It will last a good while in cool-indoor conditions, but bleach does begin to loose its strength. FYI - The Wal-Mart regular laundry bleach (Great Value) is fine, and I see Wal-Mart is also stocking their "Pool Essentials" in the outdoor section. HEB also has their regular "Bravo" bleach for $2.94 per gallon. Make sure to look for the Julian date of manufacture on any bottles you buy. For example, you may see "17-030" printed on the bottle. That would mean it was bottled 2017 - 030 day (Jan 30th). So try to get something close to our current date, or within 2-3 weeks anyways. Today (March 11) would be something like "17-070".
    Pat (a.k.a. Texas Splash) ~ My Pool: Viking Fiberglass; 17,888 Gal; Waterway Supreme 2-sp/2-hp pump; Hayward Ctg filter; TF-100 w/ Speed Stir
    Vital Links: POOL SCHOOL, RECOMMENDED LEVELS, RECOMMENDED CHEMICALS, Poolmath Calculator, SLAM, Chlorine/CYA CHART.
    If you enjoyed your TFP experience, please consider donating to Support TFP!

  3. Back To Top    #3

    Join Date
    Mar 2017
    Location
    Houston, TX
    Posts
    86

    Re: Chlorine shelf life / expiration

    Ok, I didn't know about the Julian date, thnx for the tip! I'll have to get a feel for how much chlorine I need each week. I've used half a jug earlier this week but it's stayed in range so far. I will not buy any more for now then.
    First time pool owner
    21K IG; quartz plaster finish
    Pentair 1HP Whisperflo pump; Pentair Clean and Clear Plus cartridge filter; Pentair Mastertemp 400K BTU heater
    Polaris 280; Completed Feb. 2017

  4. Back To Top    #4

    Join Date
    May 2013
    Location
    Dallas, TX
    Posts
    85

    Angry Re: Chlorine shelf life / expiration

    Quote Originally Posted by JuYuHu View Post
    Ok, I didn't know about the Julian date, thnx for the tip! I'll have to get a feel for how much chlorine I need each week. I've used half a jug earlier this week but it's stayed in range so far. I will not buy any more for now then.
    Just reading this thread. Beware of some dealers. I just mistakenly bought a couple of cases at Home Depot and found it was over a year old and had been stored all last summer in the Dallas heat. Sure enough, it didn't add much chlorine to my pool. I paid good money for mostly water.

    Be careful of the date, especially since the higher the strength of the chlorine the faster it weakens with time (see previous posts on TFP Forum).
    In-ground plaster pool, ~18,500 gal, Hayward single-speed pump, Pentair 60 sq. ft. DE filter, Polaris 280 robotic cleaner, SPA, heater (seldom used), use Taylor K2006 series test kit

  5. Back To Top    #5
    cjpwalker's Avatar
    Join Date
    Aug 2016
    Location
    Yakima, WA
    Posts
    170

    Re: Chlorine shelf life / expiration

    I'm still using Walmart pool essentials (10%) that was made in January - no issues, and still getting predictable results based on pool math. I keep them in the dark (in the box that the 2-pack gallons come in), nothing else special.
    Chris | 16' x 34' 16,000 gallon | IG Vinyl | Pentair Tagelus sand filter | Jandy 2hp epump | AquaPro PRO1300 heat pump | Coverstar auto cover | Taylor K-2006 | built August, 2016.

Posting Permissions

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