BioGuard pioneered the idea of computerized water analysis, designing innovative software to provide solutions to different water treatment programs and conditions. Alex® Water Analysis System is the most advanced and most accurate used in any market by any company. Bring your spa water sample to SpaExpo in North Austin and we’ll test it while you wait. You’ll receive detailed instructions to remedy any issues and prevent future problems. SpaExpo is Austin’s largest Spa & Hot Tub showroom located on IH-35 just south of Wells Branch Parkway.