Does Coralife make good Calcium Reactors?

who does? whats the best kind to get?

What do you recomend for a 150 gallon tank that is going to have a sump that is 45 inches long, 14 inhes wide, and 16 inches high? I already have a PH Controller and a 20 lbs co2 tank with a regulator that I used for the tank when it was a plant tank....