There are so many different products and recommendations for holding
tank chemicals. I would appreciate any first hand experience with
those that actually work to keep down odors and break down solids.


I don't use any chemicals. I think that if you have the right kind of hoses you
won't have a problem. Some hoses will pass gass threw the connections or the
walls. We use only some white vinegar once in awhile to keep the pipes from
clogging up with salt. Our vent pipe is only half and inch so I don't think
that it gets that good of ventaltion. The tube gets water in it part of the
time. We lived aboard for six years so it has been used, but we don't have an
odor problem.

Dick