I currently have a 10 gal tank that house 4 female Betta's. I am going to get filters for all my tanks, but I am going to start off with the largest. Whats a good type of filter (if there is a difference) to get. I have a petsmart, pet supplies plus, petco, and walmart around here. Not looking for something super expensive but I don't want a piece of trash either.
Also, are there any do's and don'ts with filters? Any input will help.