Redear sunfish are a good fish for swimming ponds, and they eat snails. Keeping water safe for swimmers is more about what is in your incoming water and keeping livestock away from the pond. You can always test your water for some piece of mind. My kids and their friends grew up swimming in our first pond, even with nibbling bluegill present. No health issues that we knew about, even for us and our adult friends that swam there. It is best to learn about blue-green algae and avoid swimming if/when it appears. Our dogs still swim in our 3 ponds and multiple wetlands.
[Linked Image from i.imgur.com]
[Linked Image from i.imgur.com]
[Linked Image from i.imgur.com]

Last edited by RAH; 04/18/21 05:22 AM.