Concentrated leak inspection dyes from BRIGHT DYES dissolve rapidly in water and provide a vivid fluorescent color detectable in murky water, sewage or effluent. They can be used to identify leaks, infiltration and exfiltration in plumbing connections, validate sanitary and septic hookups, and perform septic inspections to identify leachfield issues as well as sources of contamination in wells. They are safe, nontoxic, biodegradable and certified by NSF International to ANSI/NSF Standard 60 for use in and around drinking water. They are available in fluorescent yellow/green, red and orange and non-fluorescent blue, in tablet, liquid or powder form. 800/394-0678; www.brightdyes.com.