So I kinda went extreme on the canopy fan system. When I built my 65gal canopy, I basically had a couple fans inside randomly blowing air around and just one that exhausted out. Over time, dust bunnies would collect everywhere around the fans and canopy since it was just taking suction from wherever the openings were. This time, I kinda went crazy. I designed it so I have 3 large blower intake fans and 3 smaller exhaust fans. The intake fans have a mesh filter to minimize the dust and by having larger intake fans, the canopy has positive pressure so air that's not exhausted out of the smaller fans will exhaust out of whatever openings there are (gaps between the canopy/tank, etc.). This way everything coming in is filtered thru the mesh. Yes, I know, pretty extreme :crazy:.
What I also had to do is install a relay to trigger a 12v to 6v converter cause with all six fans going, it was louder than I liked. So, my Apex will trigger the relay once a certain high temp is reached (have a temp probe in the canopy) and run 12v to the fans. Otherwise, the fans will run at 6v (@6v, the fans are barely even audible).
Placement of the fans. Exhaust fans on the left, intake on the right.
All painted and fans installed permanently. That little spring board piece of wood on the bottom left is where my Apex AFS feeder will go. All electrical connections will come in at the back left where all the thru holes are.
Intake fan (without the mesh filter mounted)
Top fans are the intake w/o the mesh filters, bottom square cutouts are the exhaust ports