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

Thread: How old is too old for reagents?

  1. Back To Top    #1

    Join Date
    May 2007
    Location
    Central Texas
    Posts
    23

    How old is too old for reagents?

    I apologize if this has already been posted; I did a few searches and suspect my keywords were insufficient.

    At what point in time should you replace the old reagents in your test kit? My assumption is that, if kept enclosed at room temperature (68F-80F), they should be OK. I just want to make sure I'm not fooling myself in trusting results from 2-3 year old reagents.

    Thanks!
    35k gal in-ground with spill over spa. 2hp shared pump. Polaris w/ booster. DE filter.

  2. Back To Top    #2
    JasonLion's Avatar
    Join Date
    May 2007
    Location
    Silver Spring, MD
    Posts
    37,879

    Re: How old is too old for reagents?

    Taylor says to replace all reagents each year. However, by and large the reagents will last several years if they are kept in a cool (not freezing) dark place. The FAS-DPD titrant and the organic dyes that provide the color in the PH, TA, and CH tests are the most sensitive. If you see one of the indicator dyes staining the plastic dropper bottle it has probably gone bad.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
    Creator of PoolMath and Pool Calculator. Other handy links: Support this site, TF Test Kits, Pool School

  3. Back To Top    #3

    Join Date
    May 2007
    Location
    Central Texas
    Posts
    23

    Re: How old is too old for reagents?

    Thanks for the reply!
    35k gal in-ground with spill over spa. 2hp shared pump. Polaris w/ booster. DE filter.

  4. Back To Top    #4

    Join Date
    Mar 2007
    Location
    San Rafael, CA USA
    Posts
    12,082

    Re: How old is too old for reagents?

    You can also take a look at Recognizing a Compromised Reagent from the Taylor Technologies website. I also wrote this post with rough guidelines for reagent life.
    16,000 gallon outdoor in-ground 16'x32' plaster pool; Pentair Intelliflo VF pump; Pentair IntelliTouch i9+3s control system; Jandy CL-340 square foot cartridge filter
    12 Fafco solar panels; Purex Triton PowerMax 250 natural gas heater (200,000 BTU/hr output); automatic electric pool safety cover; 4-wheel pressure-side "The Pool Cleaner"

Posting Permissions

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