Well......there is certainly more negative stuff posted about Sea Clowns than there is positive. They just are not a good skimmer by any stretch of the imagination. Yes they do work, but they do not usually work without having to play aorund with them continually, and even then they work mediocre at best. For the same amount of money or just a bit more I would seriously consider a coralife super skimmer. ...........but under no circumstances would I ever ever consider a seaclone no matter what the price was.