Cleaning the Edge: Man, I hadn't thought of that!
I'm not sure which species of "glow fish" you guys are talking about, but there are zebra danios whose genes have been altered so they are naturally that color. It was done in a lab for genetic research, and once people saw them, they clamoured for them. Zebra Danios are very hardy and good for a beginner. The fluorescent variety is cool for kids, I guess, but not something I'd buy.