Hi Dana, Charlie Parker looks soo cute in his new hiding place!
As for the flow, I thought the Elite Mini's had a movable outflow thing? I used to to have one and I found that by turning the outflow diverter almost upside down and slightly towards the tank wall it seemed to slow it down a bit, if you see what I mean

Oh, the other thing to say is that if you don't want the bubbles you don't need to attach the venturi tubing to the outflow if you don't want to, it's optional, it will still work fine with a betta. I never bothered with it as the slight surface aggitation caused by the filter flow alone was enough to oxygenate the water, and besides as you know Bettas can air breath anyway. But hey, bubbles are pretty!