How long do test chemicals last?


Well-known member
Jan 11, 2011
Northern Illinois
I ordered a TF-100 test kit two years ago and have had great luck with it. However, I was wondering how long the various chemicals in it last? Do certain chemicals in it expire and need to be reordered? Thanks in advance!


Mod Squad
TFP Expert
Platinum Supporter
LifeTime Supporter
In The Industry
Apr 1, 2007
Sebring, Florida
While there is no expiration date, I would say that two years is pushing the envelope a bit.


Well-known member
May 9, 2013
North East Ohio
As a follow up to this, if I just bought a new kit today, and I have chemicals left in the fall. Assume I store them properly, do I really need to replace next May or will they last through the 2014 season and I replace AFTER 2 years.

Is there a way to tell if bad or not ?
Thread Status
Hello , There was no answer in this thread for more than 60 days.
It can take a long time to get an up-to-date response or contact with relevant users.