Reagents expiration?

freddy2012

Active member
Aug 23, 2012
37
#1
How long do reagents last? I store them in my garage and I don't see an expiration on them to determine how long I've had them. I have some bottles almost completely full so more likely than not they are newer bottles. I'd rather not replace them if I don't have to but want to ensure I'm prepared before pool opening.Thank you.

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I'm in NJ and we've had a pretty mild winter.

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I have the TF-100 kit.
 

faby3003

LifeTime Supporter
Jul 14, 2011
244
St. Paul, MN
#3
I get new reagents every other year. I haven't ever noticed them being less accurate during the second year. After 2 years I'm usually getting low on DPD powder.
 

JoyfulNoise

TFP Expert
Platinum Supporter
May 23, 2015
14,515
Tucson, AZ
#4
You should not keep them the garage unless you happen to have climate control in there. The reagents are best stored indoors in a cool dry space. Exposure to high heat and/or humidity will do much more to shorten the life of your reagents then anything else.