AST is the world leader in bead filter technology and design. We have over 30 years of experience engineering and manufacturing advanced water filtration solutions for high-volume applications. When it comes to creating a system that decreases maintenance time, minimizes water loss, and increases the quality of the biofiltration process, AST has the solution. Our team of expert engineers and system designers are ready to help you design a filtration system to your unique specifications. Industries we specialize in: aquaculture & fish hatcheries, wastewater facilities, aquaponics, aquarium & zoos, koi ponds, live bait & seafood, and lobster holding.