I'm surprised everything's still alive but get some of that filter media from your friend and I'd put it inside your filter to seed the other one but you could just let it sit inside the tank too.
Edit: I'd run bio balls in your fx5 along with the mech filtration it has. If you want for selection you can get the bio balls you can fill with chemical filtration aids, but most will say they are unessacary.
Edit: I'd run bio balls in your fx5 along with the mech filtration it has. If you want for selection you can get the bio balls you can fill with chemical filtration aids, but most will say they are unessacary.
