The MAXAIR500 Submersible Aerator from Septic Services sits inside the tank and out of sight. Its efficient operation provides continual cost savings through low energy consumption. It has a continuous-duty motor and stainless steel motor enclosure and legs. It’s prewired and has a 15-foot power cord. The industrial-grade, factory-built aerator has been engineered to meet or exceed industry standards and has been put through rigorous testing in the lab and field. 800/536-5564; www.maxair500.com.