Yes, some reagents can be of different concentrations. Find out exactly what the pool store has, and then do some research on Taylor's site to see if they say what the equivalents are. You really can't mix and match some of them as they are calibrated to work at the correct strengths.

Here is the original link I gave you on checking reagents: http://www.taylortechnologies.com/Ch...SP?ContentID=2

This might help. It's a search for reagents: http://www.taylortechnologies.com/pr...nts_search.asp