Re Cycle Fish Tanks Sheffield Did I Need To Re-cycle My Aquarium After Change Of Fish?

Did I need to re-cycle my aquarium after change of fish? - re cycle fish tanks sheffield

I started an aquarium, and have some bluegill I caught a local lake. I love the feeling of fish, the bluegill and so I begin with some tropical fish can release a small fish in a corner or something. Because fish are totally different, I empty the tank and start over or just a partial change of the water.
Thanks