I have used my TF-100 test kits for 2 years already. Is the chemical still good for another year? or I have to order the fresh chemical this year? I don't know how long we can keep the chemical until it is went out.
If it has been stored indoors and not in a hot/cold shed or similar, chances are most reagents are still ok. If you haven't replenished the FC components before I would do that at minimum.
Last year I purchased the whole refill kit. I had everything from the year before. This year I found that I only needed the CYA and the FC test. So I dated everything and going to use the older first and if it seems to be testing odd try out the new and toss out what isn't working correctly. I took the leftover money and became a supporter!
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