Heavy-duty and lightweight in-ground Large-Capacity Tanks from Premier Tech Aqua may be used in North American climates and are suitable for a large variety of commercial, community and municipal applications, including rainwater harvesting and fire water storage, septic tanks, equalization tanks, different types of bioreactors (MBBR, MBR, SBR) and complete process lines. Delivered ready to use, the tanks are made of rotomolded polyethylene, easy to handle and available in 4,000- to 12,000-gallon capacities. 800/632-6356; www.premiertechaqua.com.