I've actually been working on the tank quite a bit lately when I've found the time. I decided to convert to LEDs, changed some rock out in the display, and take care of a few other things I've been wanting to do.
Here is the LED build. I decided to go with the following:
111 Cree XT-E Royal Blues
54 Cree XP-G Neutral Whites
Meanwell dimmable drivers
Aluminum u-channel
Solderless LEDs w/ 6" connectors
I spent a few weeks doing research and planning out the build. Once I was ready to get started, I ordered the aluminum u-channel. The local stores had aluminum u-channel, but it was smaller, thinner and almost all the pieces were 4' length. I was able to find aluminum channel on Amazon relatively cheap. The best bang for the buck was 3"x2" 1/8" thick pieces. $17 w/ free 2-day prime shipping was pretty hard to beat. When they got delivered I realized that they were bigger than I had imagined. It didn't really matter though because I was mounting them to 2x6 studs and the extra material would help with heat dissipation.
I planned all the dimensions out, cut the 2 end pieces to length, drilled out 2 holes for each channel end, and bolted them together.