The easy-to-install Remediator from Aquaworx by Infiltrator can help rejuvenate failing septic drainfields with minimal landscape disruption, according to the maker. Inserted into an existing septic tank, the aerobic bacteria will progress to the drainfield, reducing biological clogging and allowing the soil to infiltrate the effluent. The unit is designed to require nominal operation and maintenance cost. It introduces oxygen into a bacterial growth media column, allowing bacteria to thrive and consume organic matter. These bacteria combine with oxygen-rich effluent in the tank and move to the drainfield, reducing the clogging layer and the associated odors and wet areas in the yard. 800/221-4436; www.infiltratorwater.com.