They are indeed a cool species of Knife, and one of the most commonly kept, and I still haven't had one yet! lolooh. i had a clown knife, i eventually sold him when he got to big for the tank he was in and i counldnt upgrade to something larger. they are really cool, but need some space
We will be building either an indoor pond or a custom built aquarium of around 200+ Gallons (Not sure on the exact size yet) within the next few months, so I am prepared for his size.