How to Clean Dead Leaf Buildup Out of a Pond

Remove and clean the filter before the leaves start to fall. This will allow the filter to do the best possible job of removing fallen leaves.

Prune back any dead or dying aquatic plants and leaves. These, too, can rot in the water, leading to a buildup of ammonia.

Place a fine-mesh net over the pond. This allows oxygen and sunlight to reach the water, but stops leaves from falling into the pond and makes them easier to clean up.

Skim the pond regularly with a net to scoop up any leaves that have gotten into the water. Alternatively, use a pond vacuum to remove the leaves.

Drain the water and remove the buildup of rotting mulch from the bottom of the pond. Leave enough water to cover the fish, and gradually top up the water level with clean water as the rotting matter is removed.