Why not just go to HD, and pick the color of stain you like most? or match it to another piece of furniture in the room the tank will be in. I matched the stain to my desk, and then put 3 coats of polyurethane. I used a custom mixed Minwax color. It was waterbased, and I HATE the finish it gave-- Almost enough to build a new hood. The color didn't penetrate into the wood, and when I sanded between coats of polyurthate, it lifted some of the color in some spots. IMO, DON'T USE the waterbased stains!
IF i didn't have the polurethane around, I would have used an acrylic sealer or marine urethane.
My canopy for my 100 gal is cedar, so I didn't have to do anything (smells nice too!)
B