I'm looking for a filter, skimmer, and other goodies necessary for keeping an octopus for a 55g tank. Normally I would just buy them used from craigslist or ebay, but I can't take the chance that any nefarious chemicals have been used in the tank. If anyone has a filter, skimmer, sump, etc etc that is safe for cephs, you can either pm me or post the price and model in this thread. I'm setting up the tank from scratch and am looking for just about everything I need. Thanks!