I'm almost done with the barn I'm building for my birds. The run is the next project. I'm probably going to give my ducks something to swim in, what is the best approach for keeping the water cleanish? I was thinking of putting a drain in and draining it out when ever it's nasty but that got me thinking that just dumping it somewhere would cause a major fly problem (I already got about all the biting flies I care to deal with). Is there a 'best' method of disposing of that water? Or, is there a viable way of actually keeping the water clean without needing to dump constantly?