Actually, I think im just gunna raise the egg crate and take some of the bio balls out, and put LR in the place of the bio balls, that would be submerged in the water. Now, as far as having both bulkheads at the same height, will i need to do anything special, and should the water be dropping into the water in the fuge, or can it be on the water line? and do you think 1 1/2 in. bulkheads are still big enough?