You can also mod the ER you have. Gate valve mod, I mean. This makes it far easier to control the water level and run wet, dry, or in between. Another almost free improvement is to very carefully drill the air hose connection on the venturi. Use a drill bit with a slightly larger diameter than the inside diameter of the connection. Did both of these on my CS 8-2 and it made a huge difference. HTH.
Custom Acrylic 180g RR, acrylic sump, 45BR frag tank, 18g fuge, 250+/- lbs LR, Euro Reef CS8-2, 10x39W T5, softies, LPS, and a few SPS.