my advice....the bigger the better,when your small pond is done,you will look at it a say...i should have built it bigger.....also...a pond is like a green house....the bigger the pond,the easier it is to keep the conditions under control....smaller ponds heat and cool to much..and a bigger pond keeps the water chemestry in check...other wise you will be fussing with chemicals and such.....my pond is 23 feet X 17feetX 3 half feet...it basically looks after itself...and if you have a small pond it will inevidably turn into a raccoon bath.
