yeah they look pretty fearsome at that size dont they!!! Luckilly no one has ever managed to grow one over 14" in a aquarium yet which isnt as bad, although they will still be getting a tank to themselves at that size!
As for the tank cleaning i use a extra long handled gravelvac and algea scraper, been bitten too many times already by my other fish
Got them from a shop not far from where i live, at a bargain price too since they are doing buy one get one free on nearly all their fish at the moment, i only paid £25 for the two.
I want one! the look great but the problem is that i would think they would need to be kept on there own when larger. I'm not really scared of many fish but I wouldn't like to put my hand in the tank with that thing
Trimar has them in stock at the moment Ste, about £25 each. From what i understand they will not attack fish that are equal or larger in size and rarely get to over 10" in captivity but i spose time will tell.