Backyard Dreams Delivered-Serving St. Louis MO since 1968 Baker Pool Spa builds custom inground swimming pools installs Hot Spring portable spas/hot tubs and carries BioGuard water care. We are a BioGuard and SpaGuard Platinum dealer focused on customer satisfaction. We use BioGuard's exclusive ALEX software for in-depth water analysis. Bring in a water sample for a free analysis using the fastest and most accurate water testing system in the industry.