Do you have a barrack set-up or something Hogan?
Thats the only "drip" filtration I've seen. If thats the case, Sweetie, you might want something smaller/ less complex, for your two(?) bettas. Sponge filters are cheap and sufficient for a betta's filtration needs. They are often used in breeding tanks, because they're safe to use with fry.
http://www.bigalsonline.ca/catalog/p...d1=2885;pcid2=