Thanks for the support, everyone. I'll need all the luck I can get! Honestly, I was half expecting a lot of flaming because of my tank size, but everyone's been really nice so far, I appreciate it.
I want to go up to at least 125, but they're hard to come by locally. Would a 75 gallon be alright for an Oscar and two blood parrots for life? However, I would like to get a 90 gallon if I couldn't get the 125. They're less of a rarity but still pretty scarce.
One last thing is bugging me. I added a flowerpot for him to hide in and he seems to have plucked up some. I haven't noticed him eating at all, though. How long could/ should it take?