The EarthBuster from K&P Enterprises mounts via quick-attachment to skid-steers, tractors, and excavators, and uses a probe to inject compressed air into the ground at depths of up to 6 feet. This reopens compacted or clogged water channels and breaks up biomat, restoring septic percolation to within normal parameters. The process can be completed in about three hours by one operator. It doesn’t destroy the existing lawn, avoiding sod and landscaping expenses after the repair. 406/215-1588; www.earthbuster.com.