HAHA....you arent going to like what i have to share. First, the bichers will get about 18-20 inches long, but it takes them a while. And obviously, you know nothing about them. Which is a bad thing in general. they are very predatory fish, and need to be feed heartily, and they will eat just about anything they can get part of their mouth on. So, it will probably eat just about everything else in your tank if he hasnt already.