build a beach....for 2 reasons...frogs and turtles don't hang out on sand. Most turtles would rather lay eggs in sand than other shoreline, when they lay, remove the eggs - population control. You can also easily net painted turtles - they take very quickly to being fed fish food, to the point that they will swar to you on a feeding schedule - if you really want to get rid of them, dip net the turtles during feed time and relocate them to another place. Don't kill the turtles - some people, like me, enjoy having them around as they do keep your pond clean.
Bass eat frogs, a lot of frogs, so do raccoons. chances are most of the fish in your pond will eat frog eggs or tadpoles, tadpoles eat FA - think of them as free fish food. They're also territorial so only allowing them a small area of ideal habitat will limit the amount of frogs on your pond.
