I am starting over setting up a 210 gallon reef tank and the live rock is currently cycling...yay! Anyway, I have a Mag 24 return pump and I have had a digital thermometer hooked up for a couple of days and it is reading around 84-85 degrees (I can't imagine what it's going to be when I turn on the lights). I haven't double checked it yet with another thermometer, as I can't find my old one (the house is a disaster from setting up the reef). I just wanted to know if anyone knows if the Mags run hot. If so, does anyone have any recommendations for a good in-sump pump. Thanks.