I've got the solution and it only costs about $4. :D
So I got the Hagen Mini filter in September of last year when I got my cousin's betta on a whim. I only had him in a 1 gallon tank and needed soemthing small. Found it for $10 at Petco, and they actually come with the Marina starter kits from Petsmart as well. The first thing I noticed was it was sooooo powerful even on it's lowest setting. So I rigged up a bottle baffle and that was fine, but it looked ugly and would always fall off. I knew the filter worked because it did have gunk in it. Well I was just thinking that maybe I want to take my 2.5 gallon with me instead of my 5 so got to brainstorming how I could rig this so it wasn't too strong for Ty. I had some extra filter pads for the Red Sea Deco Art Nano filter from Petco ($4 for a bag of like 4, I think) and I cut them in half to fit inside the Elite casing. I layered them as well to help even more. I noticed that the flow was slow down a lot! I tried it out with Ty and he has no problem sitting in front of the flow, but it's still strong enough to push water around for circulation. :)
Sorry for the long story, but it's a simple easy solution.
Happy fish. :)