Clean pond / duck pool
Maybe a few tablespoon of bleach may prolong the water and make it a little clearer but take caution and avoid using too much. I personally dump my water out each day. You could consider not having the pool up everyday, maybe once a week for them to take a bath to keep their feathers in good condition.
Edited by Trifolium - 6/19/16 at 10:08pm
- Overrun with Runners
Something you might consider is what some call duckponics . . . a little involved, but a few people have made it work.
You pump the dirty water into a special garden bed that pulls the manure out of the water, then the water drips back into the pool.