^ I'm not saying your right or wrong...
But personally i put my Fahaka straight into my 200G tank once it was done with QT and its happy as can be at around 14-15" after 1.5 years...
cool cool just my personal preference I've had several and I start them off in 10's while their 2-3in. as they grow so doesn't their tank they are NEVER cramped or stunted