if you can modify your canopy, i would place both fans on same side, both blowing outward. on the opposite side, you should have two openings. this should allow you to move more air through the canopy, and result in more cooling.
by increasing the flow path area (in this case, doubling the number of holes) you will increase the volume of air that can pass through your canopy.
DIY stand and Hood,
Coralife Lunar Aqualight (4x65W),
60 LB Hirocks Base Rock, 40 LB LR 50/50 Keys/Gulf
150 LB Playsand (~3-4 in DSB)
2 x Blood Red Fire Shrimp, 2 x Cleaner Shrimp
2 x Black and White Percula Clown, 1 x Orange Spotted Blenny, 1 x Red Stripe High Fin Goby