Options for black tank flushing?

I use a flush king, mainly to keep my valves free of debris and to rinse out the hose. I fill the black tank all the way with water before dumping, and add about 5 gallons of water after dumping, and the act of driving the trailer to the next destination does a nice job of rehydrating any junk on the walls and keeping the sensors reasonably accurate. Other than having something hang up my black valve once I've never had any sort of clog or issue with the tank sensor. We use Kirkland brand TP and flush with plenty of water. We have a 30 gallon black tank.