This is a marine tank. I posted it for Whacky in My saltwater forum, but thought some of you might be interested in how consuming the fishkeeping hobby can get for some folks. I would guess this guy has 20,000-30,000 dollars invested in this tank.
That is a pretty cool tank. The only drawback I would have is not being able to see my sand bed. I enjoy watching all the little signs of life going on there.