Back at home a warm day (above freezing - this was January) provided an opportunity to power wash the inside of the fresh water tanks. Each tank had two inspection ports and a baffle to divide the tank and reduce slosh of the 400 pounds of water in each tank when full.

A few photos were taken of the thick mat of black dead algea on the inside walls of the tanks. It took a few hours to get all the algea off. Part of the problem was lack of visibility when the power washer created a fog in the tanks. It eventually came off. The tanks were filled with water and bleach twice and flushed.