Leslie's Pool Supplies Pro on Mission Gorge Road in Santee is store #386 of the national chain founded in 1963, operating over 1,000 locations across 39 states as the largest direct-to-consumer pool and spa retailer in the United States. The Santee location stocks chlorine tablets, liquid shock, algaecides, pH adjusters, and specialty chemicals alongside replacement parts for pumps, filters, heaters, and automatic cleaners — the same equipment categories that Solid Electrical Services on Magnolia Avenue wires into dedicated pool subpanels. The proprietary AccuBlue® water-testing system delivers a 10-point analysis in 60 seconds, covering free chlorine, pH, total alkalinity, calcium hardness, cyanuric acid, salt, TDS, copper, iron, and phosphates, then generates a customized treatment plan. Pool owners installing new safety barriers around their equipment pads can source gate hardware and latch assemblies at the store while coordinating the structural fencing work through Fred's Fencing on Kenney Street. In-store repair services disassemble, diagnose, and rebuild automatic suction-side and pressure-side pool cleaners at no labor charge, with customers paying only for replacement diaphragms, turbines, tires, and hose sections.