I use the Flush King to add water to the Black Tank when I get there. Usually a couple of minutes worth of water. This helps keep the "stuff" from building up.
I haven't had a chance to use it on the Monty yet. I may just run the No-Fuss Flusher a couple of minutes instead.
-Dick
2006.5 Montana 3400RL
(Ma Bella 2 'cuz Mary is Ma Bella 1)
2002 Silverado 2500 LT CC SB 4x4 DMax/Allyson Prodigy Controller
Reese Signature Hitch