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How to control pond algea

Posted on April 10, 2003

Question:
We have a fresh water pond fed by a spring. Both the spring pond and the lower pond develop algea problems (the lower pond more so than the spring pond). The pond is 2 to 4 feet deep with a natural soil bottom and approximately 25 to 30 feet in diameter. We dig it out every spring in an effort to mitigate the algae but returns with vengeance. We have a lot of wild life that visit the pond and it is very close to our drinking water well (but down gradient) - we are very reluctant to use chemicals. Suggestions?

Answer:
One way to control algea is with natural bacterias that are organic and safe for wildlife and humans. They naturally occur in the pond but by adding more you can accentuate what mother nature is already doing. Aerating or using a fountain drastically increases the effectiveness of such products. One problem that you have is a very shallow pond and as a result the water probably heats up more than a deeper pond in summer. This generates more algea and lowers oxygen levels in the water. Any marginal plants that can be incorporated around the pond is advantageous also as they can help shade and the roots help the filter the water too. We carry a good many of these products and plants for ponds if you need them. Good luck, Chuck.

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