watergardens - Knowledgebase Question

columbus, Ge
Question by reason2be
February 26, 2010
i have a watergarden but the water turns green after 2-3 days. what can i do to keep it clear. i also want to add a waterfall and enlarge it by a few feet. how can i do that?

Answer from NGA
February 26, 2010


Some smooth algae growth on the sides is considered a sign of good health in a pond. Fish feed on algae. But too much algae, floating or attached, detracts from your enjoyment, causes large pH fluctuations, and can dramatically reduce oxygen levels at night. The underlying cause of algae blooms or excess string algae is excessive nutrients. Algae is controlled by killing algae cells, removing sunlight, or removing food. Floating and marginal plants will reduce the amount of sunlight reaching the pond and inhibits algae growth. Covering approximately 60 - 70 percent of the pond surface with floating plants is recommended. You can manually remove string algae with a brush or similar implement.

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