Design Tanks is a fiberglass-reinforced plastic (FRP) tank manufacturing company with more than 40 years experience. Centrall ... y located in Sioux Falls, South Dakota, Design Tanks provides engineering, design, and manufacturing processes. The company's fiberglass tanks have provided containment solutions and advantages over other materials for a wide array of applications including: -Liquid Fertilizer -Brine Maker -Water Potable -Waste Water -Odor Control -Chemical Storage -Anaerobic Digester -Brine Water read more