Ok need a little help from you wood working gurus. Im getting a 180 gallon aquarium, 6' X 2' X 2' and will build the stand and canopy myself. For the framing of the stand and canopy I plan to use regular framing wood but for actually skinning it out I wanted to use cedar planks. My main reason for this is because I have a bunch of rough cut cedar and I like the look of it. What I dont know is how well this will hold up in an saltwater aquarium environment, mainly the canopy. Would I need to put some kind of finish on the cedar, inside and out of the canopy itself, or is cedar just a bad choice all together? Id really like to use it to skin the outside of the stand and canopy but if its not going to hold up or warp and such I'll go another route. I know I could probably ask this on a fish forum but thought Id ask here first since this is where I spend most of my online time at. On another note, I finished out the inside of a metal building 16 X 32' about 6 years ago in this same cedar and its held up perfectly. I know its not the same as being around an aquarium even though we have really high humidity here.