Im confused. If that picture is yours, it's clearly larger than 1x2m. Anyways, a 1x2m pond that's always available to your 3 (or more?) ducks will get nasty faster than 2 wks. Probably 5 days? It also depends on your individuals--e.g. one of my ducks stays in the water so much, she naps there.
Hey guys, I'm wondering how this solution worked for you long-term. How often did you need to drain the water? Other maintenance?
I have a small tub (just one) with a filter pump, and yeah the filter gets clogged fast, then the pump stops... I am afraid of having a big pond, cos then that's more...