After trying several different baffling techniques, I settled for the bottle version. It worked well, but then I couldn't find a way to make the intake pipe safe for my Betta. The opening is so large I know it would tear his fins within the first few days.
I decided to ditch the filter altogether. What filters work best for you? I have a 10 gallon tank, and the filter I wasn't happy with is a Tetra 5-15 gallon filter. I thought of trying a small internal Tetra filter for 1-3 gallon tanks, but it also produces air bubbles, which I know Bettas don't need. Would trying a small filter system on my 10 gallon even work?
Are internal systems good for Bettas?
What about undergravel filters?
I leave for USAF BMT in about 25 days, so I'm trying to square away their tank before I leave.