It may seem obvious, but experience shows people still need to be reminded to read the testing instructions completely before beginning to test. Insert it bottomside up so the trapped air keeps out the water momentarily, and then turn it rightside up when you get to elbow depth and let it fill. For pools, sample midway between the shallow and deep ends. Take a sample of water that is representative of the whole pool or spa-not from the surface, which is subject to special conditions, and not in the immediate vicinity of a return line for the same reason. ![]() ![]() Resolve to eliminate any of these impediments to your testing prowess. Common mistakes are listed under each, along with the solution. Here are the five sources of error in water analysis. But on the other hand, you can't sleepwalk through a procedure and still expect to get accurate results. Even 16-year-old lifeguards do it successfully all the time. Five Sources Of Error In Water Testing…and what to do about them
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