Sushi Reef, I am currently using 2 X 175 watt Hamilton 14 K Halides, 2 55 watt 50/50 PC's and recently added 2 110 watt VHO's to the lighting. The VHO's are one super actinic and one aquasun. I have a 39 gallon sump that only houses a Euroreef CS6-1 skimmer and heaters. Circulation is provided...