Since I am really tired of kneeling on concrete and reaching into the water a full arm length to get a water sample, I made a tool. Really simple (don't laugh) but after using it for a week I am loving it. Cut about 6 inches of 1 inch PVC and glued a cap on one end and then clamped (stainless hose clamp) that tube to a piece of 1/2 in PVC about 18 inches long. Looks like a dipper or ladle. Dip into pool at chosen location (while in near standing position) for water sample and transfer water right into test vials. Not too scientific but it works!