PowerLINZ features a fresh, mint scent, is 100% biodegradable, and its unique precision-balanced chemistry kills bacteria in your dental water system. Perfect for your staff’s safety, your equipment’s longevity, and the environment’s protection. PowerLINZ services 2 chairs per year. A 4 chair practice with 2 Dentist/2 Hygienists would use 1 LINZ 3 Pack and 1 PowerLINZ.