You want a holding tank that lets the poop degrade _aerobically_. So there has to be air on top of the waste.
Use a rigid tank. Usually, _somebody_ makes something that fits in the available space.
02-28-2007 09:14 AM
I would avoid ridged holding tanks, as they are much more difficult to clean out than smooth tanks are. If you're asking about flexible vs. rigid tanks, I would probably say that rigid tanks are the better choice for most boats.
02-28-2007 08:09 AM
Flexable versus Ridged holding tanks
When I bought Privateer she originally had a flexible holding tank
(Jabsco Par 15) which still had crap (pun intended) in it after the previous owner had her up on the hard for almost 2 years. Needless to say I deep 6'd it. The new marina requires holding tank for liveaboards, and I was thinking about replacing the old with a new flexible, but I have no experience with them. Input would be appreciated.