About to buy a Hunter 26 and someone at my marina raised concerns of getting unrepairable blisters inside of the water ballast tanks that are found on these, as well as the MacGregors and the Catalina 25s. Anyone ever heard of this happening? Ever had stinky water in the tanks from microbes that live in fresh lake water? Do anything to prevent like add bleach or another anti-microbial to the tank water? How often do people pull their boats onto trailers and drain/re-fill? This boat will be living in a wet slip year round, Thanks