Posted this in one of my previous threads, but I thought it was worth sharing on its own.
Yesterday morning I got three sample bottles and took a sample to each of the three pool stores in my area. The sample water was taken exactly the same at the same time. All three pool store tests were done within an hour of each other. Here are their results:
A clear indicator of why you cannot trust pool store testing... FYI, my TF-100 should be here tomorrow!Code:Test Store#1 Store#2 Store#3
TC 10 3 0.14 FC 10 3 1.25 TA 120 - 50 PH 7.5 7.6 7.2 CYA 20 100 0 CH - - 10 Copper - 0.5 -