I've got a problem with a pair (I think it's the same pair) of ducks using our pools They poop in the pools and on the decks, I remember problems in the lakes of NH with people getting 'duck itch' from their parasites entering the water that have ducks in them, and I caught (and interrupted ) them copulating in one of the pools.
I don't want to have to harm them, but they have to learn to stay away from of the pools - there are 3 ponds near the pools that they can do whatever they want to in.
I'm not sure if a fake owl would deter them. I've heard about stringing up fishing line to deter birds, but that isn't practical in my situation.
Other than taming a fox and training it to patrol the pools, is there something I can do?