I actually filled my tank up with water to test the heater and filter so I cannot take it back, sadly.
But the flow of the filter seems to work pretty well and I put a pair of panty hose in there yesterday and the current isn't strong enough to pull the betta or the betta's fins in there. The only thing I worry about is the bubbles. I heard some betta's like to play with those though. And if I do get a female or a PK, K, or something with short fins it shouldn't be a problem. I've been told that about the filters already and it doesn't concern me all that much.
Also, I plan on getting Aquarium Salt as well. I forgot to mention that.