Vic, periodically (while at marina)I get the flashing amber light. When this happens I pour some home made salt water & amber light stops flashing. I make up this solution with no formula; salt to water ratio. Two questions: 1) How much salt s/b added to a gallon or quart of fresh water. 2) How much of this solution should be added to bowl during flush cycle? I have never measured either. Can one add too much solution to unit? BTW, I have the Lectra/San MC unit.