We currently have a "Pool Shop basic 5 test kit" from Home Depot. It is the drops but reads only to 5ppm chlorine. It says FC is what you see between 2 and 3 seconds and CC is >2 minutes. I'm going to wally world today to get the HTH kit so I can monitor CYA levels.

We got about 1-1/2" of rain last night and this morning the pH showed 7 - 7.2??? Can rain bring pH down that much? FC was in the 2-3 range. It's supposed to be cloudy today, should I dump another jug or wait til evening.