Want great service with knowledgeable staff? This is the place to go. Every year when my pool looks like the area a swamp thing monster would come climbing out. I take them my pool sample which is then tested on a large computerized machine. Out comes my report of the pool water sample (It's never good!) and the staff tells me in the exact sequence the chemicals to add and the steps to make my pool useable again. The information is always acurate and I appreciate the kindness they demonstrate as I work my way through this sometimes frustrating process! Thanks, Vonderhaars!