Great, thanks. I'll keep those in mind, as they look better for the low-flow rates... the Pentek one is 1.5gpm versus the 0.5gpm for the Omni. As I've already got one en route, I'll have to see how that goes before I order anything else. Even the cheapest things add up by the time you factor in shipping and everything else. It's also a pain to have things come right across the continent, but there doesn't seem to be much choice.