Ya, this makes perfect sense! I have a pretty hard run, so they are lucky we have a small pond, that we have a stream running out of it constantly, and a spring feeds the pond constantly too, ours is always draining, and alway filling, so we don't have this issue. Just had to make sure the OP...
As long as they have a 1ft deep water area to duck there WHOLE heads in, they will be fine. They are less likely to get bumble foot, if they have somewhere, like a pool, for them to get the weight off there feet. Plus it makes them more comfortable if they don't have to stand all day, since they...
Get duck weed plants for the pond and that should help it a bit. You can also get this, it is for drinking water, I feel like it would be fine to use in the pool, you might need 2 bottles for 1 usage though. Its an edible water protector, I don't see why it wouldn't work. Hope this helps!