I am going to build a custom tank so escape is imposible, but how big do I build it? Also what do I feed it (thepetstop.com hasn't responded to my email yet)? Now I also realize that they are venomous, but some aren't as toxic as others. I need to know some of the speices of blue rings, if anyone knows. I am 14, and trust me, I'm not getting one to be "cool", but I it is the animals behavior is why I'm considering one. Any, and I mean any help will be of great value to me.