My name is Robin and I bought a house with a 20x40 in-ground pool several years ago. I've always relied on the pool store for testing my water and recommending chemicals to adjust the water chemistry. I retired this year and have more time to research issues and enjoy the pool. During my research I came across this site ... what a wonderful site it is! I've surmised that the first thing I need to do to reduce my reliance on the pool store is invest in a good test kit. I'm looking at buying a T100 test kit and wonder how many of you also use the SpeedStir? Looking forward to visiting this forum often!