Saturday, July 30, 2011

How to Control Pond Algae

Q: Any hints on how to control algae in concrete pond? Shortly after I filled the pond, the algae started growing. I added plants and goldfish and my pump and filter are doing their job. Will the algae die down in the cool of winter? We don't get much of a freeze here in Smith River, other than a few nights in the middle of winter. I'm new to water gardening and could use some advice.

Smith River, CA

A: Algae is actually a sign of an overly healthy pond. It is common in 1st and 2nd season ponds. For a balanced pond, you will need both plants and fish. The summer heat will promote algae growth. When the weather cools, the algae will also cool down. Floating plants such as water hyacinth, water lettuce, and anacharis will help to control the algae. If you have a fountain or water fall, a barley bail will clear it right up. I use "Algae Destroyer" from the hardware store. It is a liquid that is safe for fish and plants and is very effective.