I have the TF-100 test kit that I use because I'm converting my pool. Iran out of the FAS/DPD chlroine test reagent (even though I ordered an extra one). I went to Leslie's and bought the R-0001 DPD reagent #1. I have a feeling that it's not the same thing even though the guy told me it was. Does anybody know about this? Will this reagent work?