Peggy..you have give me some great advise on the replacement aluminum tank on our 95 430. After the expence of the replacement I have been religous about pumping the tank out and flushing it several time before we close her up. This weekend the pump station was down, and we weren't gona return for about 3 weeks, so if filled the tank to about 3/4 with fresh water hoping to dilute the acid effect on the aluminum tank..Good idea or waste of time???...Thanks