To anyone who has used this filter, is this filter with the included small tetra bio bag capable of holding BB at all? I've heard positive and negative reviews but no one has specified whether or not it is actually capable of supporting nitrifying bacteria. I have a five gallon holding a single male betta with a cycled tetra 10i there temporarily along with my 3i. I'm planning on removing the 10i after a couple of weeks if I know that the 3i can actually support bacteria or not. should I get a new filter entirely or can I add other filter media to support it?