you guys whine too much about overstocking seriously. This forum is great for information, but their are way too many captain planet wanna-be's on here. Has the thought that the fish you once purchased was being kept in a small aquarium at the LFS with barely any room to move ever cross your mind? I know a huge red devil that has been sitting in his tank at the LFS for over a year. You people complain all day about tank size, yet I know if I purchased that RD he would be a lot happier in my so called small 55g then what he is currently in. Not everyone has the money or room to have a 300 gallon tank in their apartment living room.
I have a newly purchased 1 1/2" Midas and a 6" Buttikoferi seperated in a 55 currently and my Buttikoferi is in perfect condition and always happen to see me. I hand feed him krill, pellets, crawdads, and an occasional feeder. Seriously as long as the fish is in good health that is all that matters because no matter what size tank you get at home you are not going to mimic his natural environment. That dovii that you are keeping in your 180g isn't the same as it living in a Nicaraguan River roaming freely.
bleh!