One of the greatest problems that I have seen over the years in this is hobby, is the "just one more" mindset.
Been there myself, more than once. But even with prices coming down over the years, any decent quality Asian aro here in Canada is going to cost $1,000.00+. So putting the health & well being of the fish aside for the moment, it also becomes an expensive gamble for most. DIY Joey's aro takes flight to never-never land and it's no big thing, he can probably find someone to pay for his next mistake, but for most of us $1,000.00 is a serious hit in the wallet.
I'm not trying to be mr doomsday, and I am certainly no expert on the subject. What I know has all been gleaned from experience with my friends tanks over the years. Lots of things have been tried, failed, succeeded, short term, some maybe long term, who knows how things will play out? Nobody can ever say with 100% certainty, but it's always safer for the fish, and the fish keeper, to go with what is most likely. Pretty ballsy move to take a young aro from a vendors tank, and drop him into a comm tank setting, and simply hope for the best.
Bingo, not to mention the heartache that typically accompanies the loss of a magnificent fish that has become a family pet.
Depends on the comm. The comm vid of my friends tank that I posted earlier was 40" tall. Now watch the vid again, for most folks that tank probably looks like 240. Those aros were all monsters!
It was a 550 gallon tank, with a 180 sump, on a drip that added a 100 gallons of fresh water a day. He fed heavily, and kept it stocked heavily, as in that type of tank one has to. Which is why I stated, "Don't try this at home kids."