scunfcu, I run 5 - t5's, front to back are AquaScience Blue, AquaScience Special, AquaScience Blue, AquaScience Duo, UVL 75.25. The 3 middle bulbs are overdriven on an IC660. I dose 2-part using Drew's dosing pumps from bulkreefsupply.com. I run the Tunze 9010 skimmer in the tank.