Join Date: Jun 2000
Location: CT/ Long Island Sound
Thanked 45 Times in 44 Posts
Rep Power: 17
Re: Keeping fresh water from fouling
Non-toxic antifouling? Sounds like an oxymoron thought up by Madison Avenue. Potable water grows things. Would we want it otherwise? We empty our tanks each fall with compressed air, which blows them and all the piping dry, so nothing grows over the winter. A rinse with water from the marina faucet (chlorinated) and a refill(same stuff), and we're good for another season with no untoward tastes, odors, or issues. So far we've had the boat 15 years. Of course we use the water in the tanks, and keep adding more, so that it doesn't just sit all season and grow things. Once they start, growing things can keep stubbornly growing and be difficult to remove. (Would we want it otherwise?) As others above have suggested, hit your entire system with a heavy dose of biocides (Chlorine, etc., making sure they won't interact with your hoses, gaskets, or whatever), flush until you're happy with the taste, and try again.