I had a Tiger shovelnose x Red tail catfish for about a year. Wonderful fish...tons of bad tempered personality. My guy grew to 12+ inches in one year and I started to fear for all my other fish. I saw him swallow a 10" rope fish in seconds...and could see him go for my others in time. That huge snout of his can open up and consume creatures 2/3rds his size.
Wanted to build an indoor pond for him too, but my wife said absolutely no way. I came away believing these guys are not for home aquariums...yeah unless you happen to have a 600 gallon maybe.