On 6/14/99 8:49 Paul Kruse wrote: >Nope. The amount of oil is very small. One possible downside occurs to me. The key to happy holding tanks is to keep the aerobic bacteria alive and well. The stink starts when the 'good' bacteria die and the anaerboic bacteria grow. So I wonder if the introduced oil might harm the good guys - e.g., by creating a film on top of the water which inhibits oxy exchange(?) >Either way, I try to make sure that sort of >stuff does not get pumped overboard. Agreed. Though when out cruising whatever is in the holding tanks will end up offshore. In the remote islands it is a challenge as to how to dispose of oil, used filters, etc. It's not uncommon to have a village say "no worries, we'll take care of it", then see them stroll down to the beach later to bury it. Cheers, Steve ------------------------------------------------ Stephen C. Darden Email: darden@xtra.co.nz Adagio Marine Ltd. Fax: 649/4037-213 P.O. Box 161 Voice: 649/4037-801 Russell NEW ZEALAND