Upgrading my Lighting

[Gujustud]

Been doing some more planning. I figure I'll install 2 fans in the canopy for air circulation. Just to make it noted, the canopy will be suspended, about 2-4" above the tank.

Should I have both fans just blowing air into the canopy? I heard having them suck air out, will bring it salt, killing the life of the fans.

Also, I was thinking about making my own reflectors (unless it is cheaper to buy ready made). I think the only thing about the ready made ones I've seen is how big they are in height. I only want the canopy to be around 4-6" in height (slim design). That is one of the reasons I figured I'd make my own reflectors. Now if I do this, what is the best material to use? (stainless I'm guessing).