I plan on taking this bench out completely and putting the fish tanks in here... this is the north wall so I am planning to create a heat sink. Also, the stacks of "stuff" on this bench is actually all glass tiles. The roof used to be made of these (long before we bought the property). There are even cranks that used to attach to the roof to allow it to open! Since I don't think we will be able to re-do all of that, I think we will use grow lights and maybe a skylight or two and I may use the glass tiles to double up the existing glass walls for better insulation. SOOO EXCITED!!!!