My camper came with the black tank flush system that works well. However, when the camper is going to sit at home for a few weeks without moving, I will run a water hose into the stool and completely fill the black water tank and let it sit. I figure anything stuck to the walls of the tank will have an opportunity to soften/dissolve and then before making an outing, dump the black water tank at a local dump site not far away....and flush with the black tank flush system. The clean adapter shows little to nothing flushing out plus the tank sensors work well.
2012 Fun Finder XT 276 Toy Hauler & Harley Davidson Ultra Classic with Condor wheel chock
2014 Dodge Ram 2500 AT 4X4 Crew Cab 6.4 L Hemi, 373 gears, tow package, Rambox option, Revolver X2 tonneau cover, Equal-I-zer anti-sway hitch.