Several years ago, Judy and I wrote an article titled: "POTABLE WATER FOR LONG RANGE BOATERS" which was published in the America's Great Loop Cruisers Association newsletter and is now posted in the ARTICLES Section of our Great Loop website (2/3 the way down the menu home page menu). It explains how to clean and maintain your house water tanks and filter all water going into the tanks. It also explains how to produce EPA quality potable water for drinking and cookinng when using both marina and house water. John and Judy Gill Two Js V, a 36 ft. Carver Mariner Slip E-26, Sassafras Harbor Marina, Georgetown, MD AGLCA Loopers Pennsway Power Squadron - USPS Life Members Orillia Power Squadron - CPS-ECP Email: <twojscom@quadnet.net> Website: <http://homepage.mac.com/twojscom/GreatLoop/>