Here was the fun part... well not really. Took a shots at it, but I made it fit perfectly!
Skimmer made to fit:
I wish I would have done a "how-to." its pretty simple and stright forward.
Last picture, quickie of the tank w/ lights off and the flash on.
I adjusted some of the rocks (white odd ball, lol). It gives it a more natural look to it now. I'll try to take some day time pictures later on. till then have fun and enjoy!