Hi, no, there is no control button on my filter. I think it was a silly design for such a small tank. However, the pop bottle fix works perfectly though and was easy to do and doesn't notice in the tank. The betta can swim right underneath it and there are no more current issues. By the way, I think I have the identical twin to your little guy! I'll be making a trip to Petsmart today to try to find out what I need to maintain his 5 gallon tank - hoping to keep him happy and I'm starting from scratch. Unfortunately I don't find the store people too helpful so I'm glad I found this site.