Who is running a chiller

[jsn150]

doing a 150 gallon tall 48x24x30 with 400w M/H's that will sit about 12'' above the water, will I NEED a chiller ??? my wife keeps the house at 77 and I thought I could get away with a couple fans in the canopy ... any thoughts ?

[phlipper84]

Need more info than that. Need to figure in what pumps will be running on tank as well and also what temp you are shooting for. I keep my tank at 75 degrees, with a Dart, a mak 4 and a velocity as well as a mag 18 running my skimmer. 2 X 250 DE Halides an 4 X 48 Vho. As you can imagine I might have boiling water without my 1/3 hp chiller.