Hi Kelly,

People will probably have a lot to say...people with expertise.

It is clear that you can create a pool. Cement will do it. Sounds as
though you would have to formulate a way to fill it on a regulkar
basis or perhaps with son auto-fill device (we use a toilet fill
device taht shuts off when the pond reaches its level). Would you be
aiming for plants in it? A good selection would cut the algae by
grabbing nutrients.

Good lick.

Jim