So I have been using a Taylor K-2005 test kit for years without issue (except that I cannot see chlorine levels above 10 when shocking or slamming my pool). Is this the reason for recommending other kits? Otherwise, I feel like my K-2005 has served me well. I am about out of reagents and was going to reorder, but thought I'd ask before doing so as I know the TF-100 and K-2006 are recommended here. Thanks.