ElenNaur
My betta, Bozley, is very active, so it really broke my heart to see him struggling in the current the filter would create. So I did a quick google search for "filter baffle" and stumbled upon what I consider the easiest DIY project I've ever seen!
http://www.aquariumforum.com/f34/filter-baffle-8822.html
Now there is no excuse for people to avoid filters because they "create too much current"!! Yay for happy bettas!!!
There are alot of ways to baffle filters. This one is one of the easier ways lol
I usually just stuff filter sponges in there, slows it down pretty well =)