Originally Posted by
ashley84
http:///forum/post/3202698
so if i did get a 250 watt mh does that heat up enough to where i need a chiller??
It all depends on the size of your tank, how long you keep the lights on, what the temperature of the room the tank is in is kept at year round..
I have a 155 with halides and don't need a chiller. Even in the summer I have a heater on 24/7 set to keep my tank at 80. The room I keep my tank in is cool year round though. Some people need chillers, some don't. Since it's winter, you can get a good gauge of whether or not you'll need one by summer time.
You should know that if with MH's your tank is only rising a few degrees, strategically placed fans can drastically lower the temp.