eruptn 95 Posted May 6, 2020 Share Posted May 6, 2020 Hi I have a SD20, as I understand it the zinc ones should used in saltwater and a magnesium based one in fresh water. The boat is kept on a trailer and used mostly in Lake Rotoiti (freshwater with some geothermal influence). We also put her in the sea for a month or so. Similar for the motor ones Yanmar. Thanks Quote Link to post Share on other sites
kiwi_jon 26 Posted May 6, 2020 Share Posted May 6, 2020 Aluminium anodes will be the best all round anode for both salt and fresh water. Quote Link to post Share on other sites
Steve Pope 243 Posted May 7, 2020 Share Posted May 7, 2020 Alluminium Indium is good for both. Quote Link to post Share on other sites
eruptn 95 Posted May 7, 2020 Author Share Posted May 7, 2020 Thanks Quote Link to post Share on other sites
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