im going to pick up my free 180 today. It was originally a saltwater tank i wanted to know with a good scrub on the tank and sump can i just fill with freshwater and cycle? It has no sand or rocks. Just tank with residue on the walls. I was thinking of using vinegar? Any suggestions would be helpful. I will post picks tonite after i put a moving team together. Probably gonna need help resetting the sump up too.
explain please