Septic-Scrub chemical septic treatment from Arcan Enterprises is designed to oxidize the buildup of black material in a drainfield. Cleaning out the biomat helps rejuvenate a drainfield as an alternative to replacement. The product allows pumpers to add a drainfield treatment option at the point of sale. It can easily be incorporated into a maintenance program, according to the maker, and works with all types of fields. 888/352-7226; www.arcan.com.