Just got the 125 up and running 2 days ago. Using 2 small fish for mini-cycle as I transferred some sand and rock over from the 46 to get the cycle over quickly.
Painted my stand black, I'm lazy so I just painted what you see on the outside. Using a 29 gallon tank as a fuge on the left side and a megaflow 4 wet/dry as the sump on the right.
Using a dual 1" HOB overflow rated at 1200gph.
Here's the sump and fuge plumbed in, 1 drain runs to the fuge and 1 to the sump, then the fuge drains into the sump. You can see my ASM skimmer in the sump there also. I would have liked to have a bigger skimmer but that was the largest one I could get and still fit under the stand.
Built the canopy, nothing special, running 6 x 80w T5s with Icecap SLR reflectors, and waterproof endcaps. 3 12" strip LEDs mounted down the center for Moonlights.
I went with 3 ATI Blue +, 2 ATI Aquablue specials, and 1 KZ Fiji Purple to give a 15,000K appearance. These pics are pretty blue on the computer, it's really not that blue in person.
I put the light rack in the canopy on sliders so I could move it out of the way to access the tank. You can tell it makes a big difference as there was only a few inches inbetween the front light and the tank lip.
Completed (don't mind the mess, I haven't cleaned up yet and my wife makes sure to remind me that every day)
I wanted to get a school of blue/green chromis and still plan on getting 5-6 more next week when my LFS gets them in but when I got there yesterday they only had 1 left so I had to get him a tankmate and a decided to get a Bangaii cardinal.