[Rod] I wanted to share a new product with all you fellow RV'ers! It's called "Piranha" and it is the absolute best holding tank treatment on the market because it REALLY eliminates odors in both grey and black tanks and also completely digests all types of toilet tissue, soap scum and even the food particles in the grey water from doing the dishes and also that awful sour smell common to grey water! All this and it's under 20 cents per tank treatment. It can be ordered toll-free @ 1-888-299-2136 for $25.00 including shipping and that's enough product for up to 128 tank treatments!!! Here's a way to truly revolutionize the RV'ing experience!!!