Question about heat and standard 75 gal tank

[edat]

Just wanted to know if anyone is running two 250 watt SE MH bulbs in a diy canopy over a standard 75 gallon tank without a chiller....

 

[scubanoah]

im sure plenty of people are without chillers. just make sure they are up off the water 8 inches or so and a couple fans and you will be fine.

 

[edat]

Thanks for the reply.
The lights are going to be about 9 inches above the water line.
I have 4 fans... 2 120mm fans at both ends blowing cool air into the canopy and 2 80mm fans on the back to take the hot air out.

 

[scubanoah]

that sounds good. only suggestion i would make is to have 2 fans blowing air in on one side and have the other 2 fans pulling air out on the other side. would be a little more efficient that way. jmo