Rodger - Thank you for your comments. I will do my best to follow your directions.
The current discussion of smell in your black water tank is not unique to B+ size motorhomes, but since it was brought up by an owner of a B+ it might get more attention in this thread. A couple years ago, I read this posting and it might be time to bring it up again. The posting discusses how to treat our storage tanks. It is called the
The Geo Method about half way down page 2. I try to follow this and have had no problems.