Look for soft, rounded river rocks without sharp edges that could injure fish. Smooth rocks make an ideal pond flooring that won’t harm koi.
Opt for pond-safe plants like water lilies, whose roots provide shelter yet don’t shed a lot of debris into the water. Plants like water hyacinths and water lettuce are also safe bets that help create a natural haven in your pond.
Creating a natural environment with the right rocks and plants will entice beneficial wildlife while keeping your koi happy and healthy.