Our new house came with a pool. The pool was not in great shape. it was a vinyl  lined pool with a fallen liner. So first thing is remove the cover, second to remove the old liner. Then get a new liner installed and fill it up with about 20,000 gallons of tap water.

Oh my the frogs are loud and plentiful. We had a lot of drownings at first, then we added the Frog rescue pads at night. This seems to give them a solid platform to jump out of the the pool from.