Do regents really expire?

[PoolUmp]

Good morning! I’ve been using TFP method for 3 years, no algae outbreaks. Super easy. I have a pool store that I use, the owner never tries to sell me anything, and he knows I use TFP, and actually recommends it to people!
I occasionally like to compare their test results to mine, and today he said my chlorine is “upside down.” Basically they said my
CC were 2.7,
TC 3.13, and
FC .43.
My test said:
CC-0
TC-4

my R-0003 reagent says it expired 04/19. Does it really expire? Could this mess with my results? (I keep test kit inside a cabinet inside my house)

pool store owner said to add E-Z Clor O2 shock

 

[IceShadow]

Per Water Test Reagents - Further Reading:

R-0003 DPD #3 - should be colorless; as it degrades it will become yellow

So yes, they do expire, and that might be an indicator if you can see it's no longer clear.

 

[IceShadow]

That said - if you do have CCs you should SLAM. If your reagents are still clear and not yellow/brown/tinted to start, then his test is probably off.

 

[Richard320]

If you haven't used up your chlorine reagent in three years, you're not testing enough.

 

[bmoreswim]

Good morning! I’ve been using TFP method for 3 years, no algae outbreaks. Super easy. I have a pool store that I use, the owner never tries to sell me anything, and he knows I use TFP, and actually recommends it to people!

...

pool store owner said to add E-Z Clor O2 shock

Did he forget you use TFP?

 

[PoolUmp]

If you haven't used up your chlorine reagent in three years, you're not testing enough.

Yeah, first year I tested a lot, second year I kinda learned how my pool works a lot better. I’ll order a refill kit.

 

[PoolUmp]

If you haven't used up your chlorine reagent in three years, you're not testing enough.

Can you post a link to the refill purchase??

 

[Richard320]

Can you post a link to the refill purchase??

TF-100 Refill Set

tftestkits.net