Hi I have a gold fish tank is it possible to use the filter from that to help my Tropical tank gain its bacteria ??? I was going to buy a new set up for the gold fish, as for my tropical tank the ammonia is at 0 and there are small amounts of Nitrite there, I just want to stop doing so many water changes at the moment, and if the filter from the gold fish will help boost the system then I might as well throw that in the tank.