As far as coralline, 1 actinic and 1 daylight 40 watt bulb will do it with a kalkwasser reactor from Jim D. You will have coralline growing up your walls in the house. I have one of Jim D's Vortex reactors and every place the water is touching has corallline growing from DE/HQI halides to 40 watt tubes makes no difference. It is growing on everything.