I keep reading that geese do not need a pond and that a kiddie pool will suffice. Thing is I already have a 25x25 foot pond in my soon to be goose inclosure and it seems a shame not to use it. The cement pond has large cracks and needs to be resurfaced. It's about 3-4 feet deep in the middle. My plan is to place a pump on the bottom and run the water through an external filtration system and then recycling the water back in. Sound great doesn't it but does anybody have any suggestions on exactly how to do that? Also, I live in So Cal, South-East of San Diego and water conservation is a must around these parts. My thought was to add lilly pads and other aquatic plants to cut down on evaporation. Would that help? 2 turtles and some gold fish will be added as well. The 1500 foot inclosure will house 2 geese initially but I'm sure more will be added later. Main q is how to filter the water so that it can be recycled?