I am about to purchase a dual metal halide 250watt set up for my tank. I do know that these bulbs do run hot. I want to make sure the Temerature in the tank does not get to hot for my coral and other fragile things. So my question is would an aquarium chiller be a bad investment if i can get one for a good price? What do you guys think. Any of you guys run a chiller on your tank?