Are there any pictures..isn't a pond cheaper when you go that big
He probably doesn't have to matter of the filter and electricity cost..he can afford a 5,000gallon tank.
and i'm thinking if you want a pirarucu, dig a fricking pond and dig another big hole right undby it so when you go underground..it seems like it's a "tank" since there's a piece of glass that separates you and the pond water.
and i'm also thinking, why get a 4digit tank for a couple inch fish, when it might die in the near future.. wouldn't it be cheaper to keep it in like a 240gallon and then when it get like 2' move to a huge tank..