I was going to put all of my minnows in it, but I could only catch three (man, they're fast!) So there are three minnows and one of my girl Bettas (Marina).
It was basically out of scratch: I used two busted terracotta pots, a geode, lots of flat rocks (ones on the top), gravel that I don't think is visible and some small river rocks.
It took about two hours and it it really heavy.
~~I know that it's hard to see. The camera I used requires a lot of light for a good pic and my room is kind of dark~~
Here's the girl that's in the 'waterfall tank':


I know that they're dark so she's kinda hard to see. Plus she kept moving!