Anodes protect your boat hull from corrosion where salt water attacks metal and causes it to deteriorate, and need to be replaced periodically. An aluminium anode is suitable for all water types whilst zinc anodes are suited to salt water. A sacrificial anode will always be the least noble and will attract any of the electrical current, thus protecting your boat. Check out our wide range of Anodes from leading brands such as MG Duff , Plastimo and more. Check out our engine maintenance section!