I have an Oceanic 175 Bowfront (72L x 29H x 24D) with a 3" Fuji Pink Sand Bed and 200 lbs Tonga Branch live rock. I have mostly soft corals with a few fish. Which would better: 2 Tunze 6000s with a multicontroller or 2 Tunze 6100s with a multicontroller? And what would be good placement in the tank for the Tunzes? Thanks, Frank