ph/OTO test kit help

[haeffnkr]

Hello,
thanks for the response.

I checked both kits before I posted, both are exactly the same.
Both have the same tester, the same r-0014 and r-0600 reagants.

What is the shelf life of the testing solutions (kept inside, not extreme temps) ?
Did my solutions get old and read invalid?

[waterbear]

It is possible that you have a bad reagent. It has been noted before that if you do multilpe pH tests in a row sometimes the pH will read higher, possibly because the tester was not rinsed out properly. I would try testing again, rinsing out the tester with pool water several times between tests and if the new reagent is testing higher I would contact Taylor with the lot number. Phenol red usually does not go bad. I have some that is about 7 years old and is still testing the same as a brand new bottle I got about 2 months ago!

[haeffnkr]

Hello,

I do rinse my tester out very well between tests and used the same sample water for the test....I will try it again and see what happens.

Good idea to call Taylor/Leslie if my results are bad....

What about dropper/droplets size?
Could that be the problem?
I wiped both droppers after the first tests but they stayed the same on the seconds ones?

[haeffnkr]

I tried the test again this morning....same results 7.0/7.1 vs 7.9?
I washed the tester several times in the pool and the caps to, between tests....I guess I will go to Leslie tonight for a third opinion?

Really confused here....

thanks for the help thus far.
Kevin

[waterbear]

since the reagents are both Taylor reagents I would call them with the lot numbers and ask them.