What is the best filter for a 2.5 gallon plant/betta tank?
I have the 2.5 Gallon Aqueon miniBow and the filter that comes with it is awful. I used API first layer laterite and the tank is still red dusty after 3 days of running that stupid filter. The cartridges that go with it have barely any carbon at all in them, just a few pebbles. I am looking for a small filter that I will be able to put my own bagged stuff in. What do you guys recommend? I don't want a huge one that will take up the whole tank, but I still want to be able to fit whatever filter media I want in there.