Yeah I don't know how to think of my tank since it had been up for years but when I got it I scrubbed the whole tank down and changed the rocks. Same filter and media though. That put it into a mini cycle but its been stable now a few weeks I think close to a month but I'm keeping an eye to be sure. It will take me some time to add other fish to give the tank time for the bb to keep up so none of this is going to happen quick.
I'm thinking the loaches next.