calcium is actually a little on the high side i think 480. You are right the algae is not that much, we just got the metal halides and atinics in January, before that we had a very very very weak lighting system not worth mentioning. Wattage??? I dont want to sound dumb, but he handles all that, I think they are 14K I heard him say that and the atinics I dont know. :notsure: