Setting up 2g Need filter

I have 2 of the little Azoo Filters. They say they are for 3 gallon tanks. I've had one running on a 5.5 gal for a couple months now that have some Red cherry shrimp in the tank and before that housed guppy fry. I have a small sponge pre-filter on the intake (keep babies from being sucked up) and it has worked well. The bio-load though IMO is not real large so it has been enough to filter this tank. It is crystal clear.
 
I got my neighbor's little girl a 2gal tank for Christmas this year. I got the Elite for it. I have had the internal filter sponge in my tank for about 3 wks now. I think the Elite will do nicely in a small tank like this. But she will only have one little Betta in it and a snail. I think the Elite is a good choice for a small little tank.
 
AquariaCentral.com