Algae can actually give off carbon dioxide under certain sunlight conditions, and deplete the oxygen in the pond. Single cell algae cause green water. String Algae adhere to rocks and near waterfalls, and can mat together and become quite unpleasant looking. In addition to the more serious issues such as lack of oxygen in the pond, algae make it hard to view colorful pond fish such as beautiful Koi or Gold Fish.
Controlling Algae involves both treating algae and preventing it. Preventing algae starts with adding water plants. Pond plants absorb nutrients from the pond water that are produced by pond fish. Add a number of “Oxygenating Plants” to your pond, that add oxygen back into the pond water. Also consider floating plants such as water lilies, which cut down on the amount of direct sunlight that enters the pond. Pond plants tend to help starve the algae. The garden center or pond store that sells aquatic plants can recommend the correct amount and type of pond plants that would work best in your pond.
Once algae occurs, it is best to use one of the commercially available water treatments to kill the algae that has taken control. Most recommend that you reapply the treatment for maximum effectiveness. Allows follow the label on the product you choose. Make sure you know if you have single cell type algae with green water, or string type algae that attaches to rocks.
For larger ponds, many pond keepers prefer to add an Ultraviolet Clarifier. UV Clarifiers kill algae and suspend them until they clump together and become large enough that a mechanical or biological filter will remove them from the water. For success with a UV Clarifier, it is critical to follow all the manufacturer’s instructions for proper handling and installation.
Be aware that UV Clarifiers work great for single cell algae, but not for string algae. To remove string algae, some pond experts recommend using the water pressure of a submerged water hose against the rock or sides to free string algae, or remove it by hand and lift it from the water with a pond net. Some people also refer to string algae as blanket algae.
Lastly, proper feeding of a quality pond fish food can also reduce algae in your pond. This is a valuable piece of the puzzle and is often overlooked by pond keepers. Using the right amount and combining with the best ingredients will increase the digestion in the pond fish, which means less nutrients will pass through and fuel algae growth!
To learn more about feeding pond fish, visit our new website by clicking: Fish Swim Here!