Septic Saver multi-strain microbial additive from BioStim is designed to prevent foul odors, slow drains, seep hole blockages and excessive tank pumping in septic systems. Regular use can help keep the septic system free-flowing by digesting fats, oil, grease, soaps and other organic household waste and prolong the life of the entire system, according to the maker. It is safe for plumbing systems in homes, RVs, portable toilets and sewer lines. It contains no caustic or corrosive chemicals, is free of enzymes, emulsifiers or surfactants, and does not cause grease to pass through to the leachfield, where it can re-solidify and cause a septic field failure. 800/338-8812; www.biostim.com.