Natural Way to Control Moss in Ponds


Pond moss occurs in even the most well-balanced ponds. This form of algae, also known as filamentous algae, resembles green fur and grows on the bottom of ponds and on surfaces such as logs and rock. As these bunches of fur-like moss grow larger, they break from the surface of origination and float to the surface of the water. Moss adds no value to pond water or life in the pond. The best natural way to control moss in ponds is to introduce pond scavengers and oxygenating plants into the pond.

Disadvantages of Pond Moss

  • If pond moss gets out of control it will start to consume the oxygen in the pond and block sunlight from reaching the oxygenating plants under the surface of the water. Moss also coats the floating water lily leaves and other plants and reduces their ability to balance the gases in the pond. As the oxygen level in the water drops, fish start to struggle for air and eventually perish.

Oxygenating Plants

  • The best way to control pond moss is to include plenty of oxygenating plants in the pond. Oxygenating plants remove excess nutrients from the pond and stop algae before it gets a chance to start. There should be at least one bunch of oxygenators in every 1 to 2 square foot of pond surface area. Some good oxygenators are parrot's feather, anacharis, hornwort, green cabomba, lemon bacopa, moneywort and rotala.

Pond Scavengers

  • Another natural way to deal with pond moss is to introduce pond scavengers such as tadpoles and snails into the pond. They feed on algae. Water fleas provide another good way to help with algae as these tiny crustaceans feed primarily on pond algae. Cyclops is another very small crustacean that feeds on algae. It has one eye and swims in a similar jerky manner as the water fleas. Cyclops resemble an elongated pear. Both crustaceans not only help to fight algae but also constitute live food for the fish. They multiply very quickly in established ponds.

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