Well guys, I went for a syno nigri (not the nigriventis). I believe he's also called the black-spotted upside-down catfish. Actually I got 2, one to replace George and one for my Rio 180. Also, there was a lot of algae growth in the Rio so I went for a big clean-up team and also got 1 bronze cory and 2 peppered cories. They're all georgeous, only small and none will grow bigger than 5-6 inches. You should have seen their faces when they saw all that algae!! Something like this: 
