Posted: Sat Oct 28, 2006 1:19 pm
I think a powderhead basically moves the water to improve circulation, but doesn't in itself filter it. They're often used with undergravel filters. If you used it in conjunction with some kind of filtering device, it would filter the water. A "real" filter would have media that provides for at least mechanical filtration, and (good) canister filters additionally have ample room for biomedia and optional chemical media.
If you're interested specifically in the Aquaclear, I'd just get the filter.
"You become responsible, forever, for what you have tamed." -Antoine de Saint Exupery-