Yes I put a new fx6 on my old tank for about a month and it's been on the new tank now for about 2 weeks and I ran my old fx5 on the new tank for two weeks to help the other filter start its bacterial growth... Also I put a quarter or established media in eat filter to also help out
Well actually the tank has been set up for about a month now I waited two weeks and my Aro and everyone is basically in just waiting for my last two fish to go in the just need to gro my Aro is pretty aggressive