Ideas for Pateo Behind Master Bedroom

Is a pond near the hot tub possible?

Is it possible to have a pond ecosystem that can handle ducks in it? Ducks are pretty messy.They will eat the fish and bring their food into the water, mate in the water and eat the pond plants.

We'd have to cover the hot tub when not in use to keep animals out of it.

Could we have a beach entry to the pond?

Awning over tub.
Summer have tub water cool and awning out for shade.
Winter have tub hot and awning closed so you can see the stars!

Placement of the tub-
in the corner with a fountiain flowing into the pond?
or
in the wall with fountains and pond symetrical around it?