Originally Posted by edatlanta
As I posted previously, I don't add any water to my black tank after dumping. Why add water initially when the tank will get plenty of use as the day progresses. Besides, the tank will always have a little water in the bottom that doesn't drain out so it will never be dry.
I would say that is good advice for someone that is a full timer.
I always will add some water and chemical after my final dumping when departing the campground as I will be having the RV in storage until my next trip. This serves a few purposes. It helps loosen waste on the drive home, also helps to prevent the tank from going dry while in storage and, helps to prevent unwanted odors.