Cheswick Pools and Patios carries a complete line of BioGuard Pool and Spa Products. We are Pittsburgh's premier location for pool and spa water testing and a Bioguard Platinum Dealer. Bioguard Platinum Dealers have the highest level of expertise and testing equipment in addition to the best products and chemicals available for residential swimming pools. Cheswick Pool's expert water tester is a chemical engineer with over 15 years experience in pool water testing.