Thanks, guys.
I've been laying off the forums lately and focusing on wildlife photography. I lost quite a few fish last summer while travelling, including a DFI gold cross back and it was like a kick to the crotch.
I still have 3 aros and I just recently moved the Diablo into a 240 but made the mistake of using a sand-coloured tile (because it was free) so he's washed out and I'm less than happy with it so I'm going to swap out the tile for something darker this weekend. I had no idea a light coloured tank bottom could have such an effect. I will post updates shortly, even just to show the difference between a light bottom and a dark one.