would suggest going with a 4 bulb unless you are thinking of upgrading the tank size in the future. also cheaper for bulbs. would steer away form wave point due to no cooling fans. for bulbs i would go with 1 Korallen-zucht fiji purple, 1 ATI aqua blue special, 1 ATI blue plus, and 1 uvl super blue actinic. if you go with 6 bulb, I would double the blue special and super blue actinic.