Planted Tank Obsessed
Join Date: May 2015
Location: Central Michigan
The azoo palm filter is a great tiny HOB that's perfect for 2.5g tanks. It can be had for about 7 bucks + shipping/tax on drsfostersmith.com, anywhere else I've seen them they're like $15.
I cut an AC20 sponge to fit the filter chamber and made a tiny media basket for some matrix out of a pot that plants came in. Works pretty great for me. The filter comes with a decent prefilter sponge too.
Lots of people here use them and their are a few brands for the same filter:Azoo, RedSea, I think finnex makes a version too.