help please

My new home has a fish pond which has not been used for about 4 months. The previous owners removed the fish but have left the pump and filter for us to use. I would like to get the pond ready to put some gold fish in but I have never had a fish pond or fish before and don't know what I need to do to get the pond ready. The pond has had water in it for the last four month but we have not had the pump on since we moved in. Can someone tell me what I need to do to get the pond ready for fish ?????


All help appreciated
Many thanks
Damian