I bought a TF-100 kit about a year ago and used it for several months last summer on a 14' Intex pool. I've just put the pool up again for the summer and I'm getting strange test results:
R-0870 powder added to a test sample stays clear
R-0600 from K-1000 kit added to a test sample stays clear
This is over the course of 4 days, testing each night. I've added enough bleach to go from FC of 0 to FC of 4 each night, and last night added enough to go from 0 to 10 (4 being the nominal goal and 10 being a shock).
So as a check, I took some tap water and added a splash of bleach and did the tests:
R-0870 powder added to some of this mixture stays clear
R-0600 added to some of this mixture results in a few red particles floating on an otherwise clear mixture
Did both my R-0870 and R-0600 go bad within a year? Any other possibilities? The kit has been stored indoors, in a closet.