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Have a friend who thinks the sun rises and sets on Eclipse systems...but, they are not good enough for octos, even dwarves...they were meant for freshwater setups, and have been slightly upgraded to meet some basic salt requirements, but there is no way they could maintain the quality needed for a ceph...sorry !
The best is still the 50-60 gallon tank, with a good filter and a great skimmer...costwise, it is also the most efficient for small octos like a bimac.
I get the impression that dwarfs aren't as interactive and are much more hit-or-miss because when you find one for sale, its typically fully grown with a few weeks or months left to live. Bimacs really seem to be the way to go, with the best of all worlds: intermediate size, aquacultured stock, diurnal behavior.
I agree with Cthulhu: if you're serious about getting an octo, get a "real" setup.