Test strips, Colorimeters, and test reagents are typically fast and easy to use for testing your pool water. You want them to produce results that are sensitive, accurate, and reliable. With accurate results you can simplify the maintenance of swimming pools and spas, which makes your customers happy. This leaves more time to sell your skills to new customers; and word will spread that you know how to keep a sparkling clean pool.
Clipping is a handy way to collect important slides you want to go back to later.