I have had my N30 MKIII for about a year and a half. The end of summer we went through some pretty rough water. Our fuel came through fine, however we discovered a very 'nasty' problem later. The previous owner didn't use marine toilet paper. We'd done many pump outs but had no idea what lurked in the bottom of the holding tank until we beat over 4-5 foot waves.
We are filling about half the tank with water now and trying to beat over the rough stuff to stir the pot, then pumping out. Hopefully, we've cleared the paper and have a nice clean holding tank. We hope to never see an eruption
off our port side again!
Just something to think about...