Quote: (Originally Posted by
Tienuts)

They are not needed - the remora will still work fine. But the 5.5 inch DR bands are a hell of a lot more stable when securing the larger cylinders. The remora is too mickey-mouse IMO. Also less corrosion issues as John pointed out.
I have never attempted to separate my sets of doubles, but I have heard of people having trouble with corrosion with the remora. If it becomes a problem in the future, I will consider the bands; however, given that my tanks are still relatively new and that I only use the lighter 13's, it has not become an issue, yet.
Thanks for the info guys!