Janan, you should totally try to find that person to see if it really was!!! That would be totally awesome
I wasn't sure if y'all would have gotten the Austin Powers reference if I had just said lol For some weird reason my mom's bf hasn't seen it yet!! I'm like "oh no, you cannot be part of this family and NOT have watched; The Emperor's New Groove, Rocket Man and Austin Powers lol, our three favorite movies ^_^
Anyway, yes sponge filter! In this case you can actually uncover the power head if you want to help the girls from chasing each other all the time and stuff, it forces them to break up. And then you'd have the sponge actually doing most of the work for you which is good ^_^ I'd suggest getting a 15 one, it's a bit bigger but you can hide it with plants!