How to Clean Algae From a Backyard Pond
A backyard pond that never gets algae is rare. A little algae is normal and not a bad thing---although it may not look pretty. However, when algae gets out of control it can be a real nuisance. Algae feed off of decaying material in your pond. This material may be leftover fish food, fish excrement or dead organic matter (leaves or grass, for example). A good pond pump and filter will prohibit algae growth to an extent, but even with a filter, occasional algae blooms are common. Removing algae after these blooms is not difficult, although it can take some time to get water clear again. Does this Spark an idea?
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Instructions
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Turn off the pumps temporarily and then, with gloved hands, pull out any stringy algae you can see. This stringy algae may or may not be present in your pond.
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Use a fine-mesh net to scoop out floating algae---the slimy green algae, which is common. If you prefer, you can forgo the net and scoop it out with your hands. When netting the larger clumps of algae, try not to stir up the water too much. The algae will break apart and you won't get as much of it out.
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Add some fresh water to your pond. Don't change the water completely---just add about one fourth of the volume. You don't want to upset the pond's natural balance---which your fish wouldn't appreciate either.
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Add algaecide to the water. How much to add depends on the size of your pond and the type of algaecide you use. Make sure you use one that is safe for fish and plants.
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Put beneficial bacteria (look for this at any place that sells pond supplies) into your pond at least once a year. These bacteria will help reduce algae growth. Common brands of bacteria are Green-B-Gone and Hydro-Bug.
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Tips & Warnings
Keep ponds well-aerated, shaded and clean of waste products to reduce algae growth.
If your pond has fish, make sure the products you choose are safe for fish. Most algaecides for backyard ponds are---but not all are. Algae is slick. If your pond is large and you decide to wade in to hand-remove some of the algae, be careful not to fall.
