Anyone have one of these or have any tips. I've read all the "nuke cuke" articles, but I've also read the articles that praise these animals as one of the best sand cleaners around. Even that some of them, if highly provoked and evicerate themselves, aren't even poisonous enough to have a huge impact on the tank. I know these creatures are a bit of a crap shoot, so does anyone here have an opinion? Thanks, here's a pic...