I have a 2.5 gallon with a filter and the filter seemed to bit a bit much for little Gilgamesh. I found a way to soften the filter output. (I pulled apart an unused shower puff and rinsed it well. Then I attached it so it would soften current.)
I was still trying to figure out a way to slow the intake of the filter a bit and went to Petco to see if anyone there had any ideas. Most of the staff at our local Petco are very helpful and they do take good care of their bettas. (platic cups aside) The guy working that day, however, just lectured me on the importance of having a filter and letting it work as it was designed to do. (blow-hard) I continued browsing and stumbled on some large filter sleeves. I thought these might help keep the water cycling full time but block most of the tank from the intake current.
I put the sleeve around the filter but did not turn the filter on right away so Gil could adjust to having something new in tank.
As it turns out - Gil is having a wonderful time in the fun, new "tunnel" that his mommy put in for him. He won't go in it when the filter is on but the minute it's off - he's playing in it.
So much for my "running the filter full time" plan...
Okay - 2 quick questions, betta experts.
1. My betta sometimes swims really quickly up and down the side of the tank and when he gets to the bottom, he'll "sideswipe" the sand at bit. Is this normal?
2. There is a small section of my tank that seems to have a reflection (basked on what Gil does there) but it's in a spot where I can't put a background. Gil swims there often and flares at the "other guy." He seems fine but I don't want him to get stressed. Can I leave the spot alone?