The first 2-in-1 tank cleaner specifically formulated for black/gray water and portable tanks
Cleans overnight - then just dump and go
Micro-foam action improves surface contact to vertical tank walls
Active enzymatic blend blasts crud and attacks tissue, waste, and grease
Formulated safe for RV/Marine tanks, plumbing, seals and surfaces

 
 Thetford Tank Blaster - Level Sensor Cleaner - Black & Grey Waste Water Holding Tanks & Portable Tanks Cleaner - 4 x 1.6 oz Packets Thetford - 96527,White