At the beginning of last year (prior to discovering TFP and the TF Test Kit) I purchased a Taylor K2006 test kit.
I've read that the test chemicals lose their potency and you should replace them annually. Do I really need to replace all the chemicals each year, or will the one's I have last another season?
R-8071 is the only one I see where I might need run out and need a refill prior to the end of this season.
One more question, I use BBB for my pool, but I've recently switched my hot tub from chlorine to bromine. Do I need to order the R-8072 for testing the hot tub or can I continue to use the R-8071? If I'm understanding things correctly I can continue to use the 8071 for the hot tub, but each drop counts as 1.25 PPM instead of .5 (using 10 ML).