Hi - we have two goldfish types, 6-7 inches and full bodied in our pond. For several reasons we will bring the fish inside for the winter. We've been convinced that a long, low 29 gallon tank will do the job.
We are getting conflicting information on the rest of the needs. We thought a filter and an air pump were needed, but one salesales person said just a filter. Are air pumps built into filters (she couldn't answer that)? No answer to this was found on a search.
Otherwise, I hope we are good to go here.
Thanks - Mike