Alright.....like I said before my temp in my tank has always been 84-85 degrees after my 6 hour lighting cycle.
After 2 days of testing my current fan design (below, these fans are on the back of the canopy right by the open back). My temp has dropped to 79 degrees, I waited 2 days to post because I wanted to be double sure, but I'm very happy with my tank getting down to 79
degrees. My heaters are set at 77 so instead of a 7-8 degree temp rise, I only have a 2 degree temp rise. I'm very happy with this setup. I will leave it with this design until it is no longer effective (maybe during the summer months).
| 400W MH 400W MH |
| Fan (Out) Fan (Out) |
| Fan (In) Fan (In) |
120 Gal Tank