Hi guys, I'm a first time duck owner, and setting up my duck enclosure as the babies are growing. They won't be free range, due to safety issues, so I am in the process of constructing a large run for them. In it, I'd like to have a small pond for them. Just one of those pre-formed kit ponds (I've found one on c-list for $50.) that you drop into the ground and are done with. Like this: http://i.ehow.com/images/GlobalPhoto/Articles/2001970/preformedPond_Full.jpg I'm guessing it's between 150 and 200 gallons? However, I know ducks are messy messy messy. So I'm hoping that someone has experience with keeping this specific type of pond clean. Daily dumping is obviously not an option, as it would be set into the ground. Siphoning is an option, as the duck pen is essentially in the garden, and the water would be put to good use. But what I really want to know is: Does anyone have a filter system that is handling the mess of ducks in a pond this size?? Plugging in a filter is just the easy sort of maintenance lazy me is looking to do! Did you buy it? Make it? How many ducks are using the pond? Do you have to scrape out the bottom every so often? Do the ducks have limited access? Thanks! I've searched this board a bit, and read about keeping BIG ponds clean, but what I'm really interested in is ideas and experience from people using these smaller pre-formed ponds.