Isn't that just a ait pump?
Bettas typically do not like a lot of current. But depending on your tank needs, you may be forced to have some current. If you have to have some current, just try to make sure there is an area where your betta can take a break.
In my 4 gal, I have to have some current, but the way the flow goes, there are a couple spots where he can find some peace. In my 30 gal, there are many places where either the flow is intense or next to non-existent. But my two bettas in there love both areas.