Black water chemicals

Wow talk about a Duh moment! Thanks for mentioning the fan! OF course that would pull the odors up. I had not thought of that before. We have had problems with odor. We have a solar vent fan in the pipe and use tank treaments but still have "Broccoli Fart" odor coming out the tank.
I will try the bath fan off method and see how that works.

Has anyone had the Chems go off after sitting in storage for a month or two? Should I just leave a clean empty tank until ready to go out again?