B.O. Plenty wrote:
Just use lots of water, dump when it burps at me when flushing. B.O.
That is the single best thing to keep your black tank clear all the time. I have seen even old time RV'ers hooked up to sewer with their tanks open for their whole two week stay. Any solids in the tank will dry out and be like rocks in there. Turds will not rehydrate like apples, it takes forever, if at all. By waiting until your tank is full you will flush 50 gallons of waste at one time which will leave nothing behind. I also try to leave a couple of bowls in the tank at all times - while on the road or parked between trips - I figure that keeps everything soft and helps breakdown anything that may have been left behind. Just my two cents