Any opinions on the best hang on tank protein skimmer? Looking for a 55 gallon set up lite stocking with softies and a few fish. Only heavy bio-load will be 2 small eels. I've been looking at Reef Octopus and Aqua C Remoras. I'm not opposed to used either, so fire away if you looking to unload one. Mr. Reef please chime in cause you seem to always have good advice. Thanks.