Posted: 20/11/2012 at 09:47
If you are looking for low maintentance, I would steer clear of Koi, although at 4 x 6 I assume you were probably not thinking about them anyway. Goldfish are a much more resilient bunch.
Also, you will probably find that the bigger the pond, the easier it is to maintain. Of course you will need bigger filters etc, but in the same way that if gardeners look after the soil, the plants will (sort of) look after themselves, with a pond, if you look after the water, the fish will probably be alright. With larger ponds, you have a bit more time to catch any water problems before they cause problems for the fish.
I have had a pond for many years, but my neighbour gace me a great tip this year which I had never heard. Throw a couple of corks into the pond and it gives the local honey bees a life raft should they ever fall in.
Good Luck if you do decide to go ahead.