can't find much info on them but found a guy selling them for $30 and was thinking about getting one for my 130gallon. Would this be overkill, or would it even be sufficient filtration for cichlids..? Heres a link http://cgi.ebay.com/BRAND-NEW-Biolo...yZ134662QQrdZ1QQssPageNameZWD1VQQcmdZViewItem