Hi Naomi <waving back>
I ended up going non filtered on my new 1.5 gal hex.
I used gravel from one of my running 10 gal tanks, and water out of my 55 gal. (start out with a good bacterial population this way)
I put in 3 White Cloud Mountain Minnows, and 1 Ghost Shrimp.
I used the White Clouds so I could run it without a heater.
I used the little air pump that came with the hex and an air stone,
I used a 10 watt 6500K compact fluorescent in the hood
I feed lightly everyother day.
It's been up and running for just over a week, and so far so good.