Have you tried bleach?


Seahag wrote:
Yeah, among other things. It's a miracle I didn't kill the critters!

Bleach kills critters, but it's also rather corrosive on lots of other
things. My advice is to never use bleach on anything on a boat, unless
you have very carefully prepared both the object to be bleached and the
surrounding area. More trouble than it's worth IMHO. And despite all well
intentioned advice to the contrary, putting bleach down a marine head is
one of the worst things you can do to the whole sanitation system.

Did you try vinegar? Works miracles on stinky boat plumbing.

Fresh Breezes- Doug King