Peggy,I found the odor in the boat, it is coming from my AC intake. OK, so I am new at this and did not realize how often I needed to clean the strainer. I checked and cleaned it about a month ago, and it was a little dirty. This time I had barnacles growing in it, and it was black, the hoses are now also black up to the pump. I realize that to get rid of the dead "bugs" I may have to replace the hose up to the pump. BUT before I do that, how do I keep it from happening again?Can I fill bleach into the strainer and use the "gravity feed" valve to draw the bleach into the line to clean it and kill anything living in there?How about adding part of a pool chlorine tablet in the strainer?What works, what will cause me problems.Thanks all in advance.