The white color of the bottom corner of this aluminum tank was caused by a leaking deck fill, salt water and a copper pick up tube.


This is a prime example of why the ABYC standards specifically prohibit the use of copper based alloy fittings in aluminum tanks without a form of isolation.


The corner of that tank was "hot" and had multiple pin holes eaten clean through it. The rest of the tank was perfect but where the salt water, copper and aluminum met the corner was ruined.......


The stench of diesel in this boat was enough to make you vomit....