So I’m about to purchase a new tank to upgrade from my 200. I only have one Motoro Ray but am planning on getting more. The new tank is 72 long 48 wide and 24tall. The only thing I’m concerned about is it has a center overflow right in the middle. Do you think this will bother the rays in the long run or am I fine. Also if I decide to run it bare bottom how much flow can I have at the bottom to ensure the rays are comfortable? I’ve always had sand.