petsmart diseased my 10 gallon so i decided to take it down. i have a 15 gallon filter on that tank i would like to use on my 46 gallon bowfront. is there any way to rid that filter of disease? i dont have a clue to what the disease is i just know that its killed three of my most hardy fish. it WAS my qt. so my question is, is there any way to rid this filter of disease? thanks!