Insects serve as an important food source for the other pond fauna. Snails Including snails in your pond is very important. Snails help keep the pool liner clean of algea and help keep the water clearer. Be sure to buy enough snails for the size pond you have. Frogs Tadpoles and frogs work very hard sanitizing your pool.
Tadpoles eat fish food and moss-like algae.
Frogs thrive on insects.