Walex CMDOBG Commando Black Holding Tank Cleaner - 4 Pack

Treats your black holding tank system with an all-natural enzyme cleaning treatment in as little as 12 – 24 hours!

• Pack of 4 COMMANDO Black Tank Cleaning Drop-Ins
• Removes residual waste build up that can cause inaccurate sensor readings and residual odors
• Removes odors and build-up in as little as 12 hours
• Super-concentrated, scientifically developed formula with natural enzymes to penetrate and break down waste and paper build-up
• Use to remove existing build-up or to prevent build-up accumulation
• Lubricates valves and seals
• Easy to use dissolvable packet
• Septic tank safe
• Formaldehyde-free
• Biocide-Free
• Zinc and Copper Free