I bought a beautiful butterfly tail Betta. He is having a really hard time with the water filter. I have the 3 gallon mini bow tank with the water filter it came with. I do think that it moves the water quite a lot for a small tank. Some of my other Bettas have not loved it either. In the past, I have put a little bit of foam filter in the intake pipe to reduce the flow rate, but it didn't do a great job filtering the water like that. Since this tank was created to use the filter system it came with, I'm not even sure how well another type of filter will fit in there if I change it. I have the filter off for the moment. I want to give my Betta the best home I can, and I don't want the filter to stress him out! What flow rate would be good in this small of a tank? Should I forget the filter and just change water more frequently?