I have 2 BN's... I pulled one out of my 125 a couple months back and put in my 40b. The back wall was a solid green wall. Now, it's just got a few spots of BBA on it... But, you should never buy a fish to solve a problem... If you like them, then you'll probably enjoy some of the benefit of them.
"What, exactly, is the internet? Basically it is a global network exchanging digitized data in such a way that any computer, anywhere, that is equipped with a device called a 'modem', can make a noise like a duck choking on a kazoo." - Dave Barry