Walex Bio-Pak (R) 2-Bag 32 Gram Pouch Holding Tank Treatment w/Deodorant BIOTROP2 13-5757

Biological treatment is used to deodorize black water holding tanks, break down solid waste & liquefy tissue to prevent messy clogs. It doesn't have formaldehyde. It lubricates valves & cleans sensor & treats up to 50 gallon holding tanks. It comes with d