How to Use Barley to Prevent Algae in Ponds
Barley straw is a natural treatment to prevent algae problems in ponds. Unlike conventional algaecides, it doesn't release pollutants into the environment. Barley straw is also relatively cheap and simple to use. It seems to work best at preventing algae rather than killing existing algae. Barley straw also does not appear to adversely affect fish or water wildlife. As a safe alternative to chemical algae control, it may well be worth trying in your pond. Does this Spark an idea?
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Instructions
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Purchase approximately 0.8 oz. of barley straw for each 10 square feet of pond. This is the same as 225 lbs. per acre of pond.
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Put the straw in the mesh bag. For small ponds, an onion or fruit mesh bag will work.
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Add floats. A plastic ball is a suitable float for a small bag in a small pond.
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Float the mesh bag in the pond. It is best to add the barley straw in early spring, before algae has had a chance to establish itself. Replace after 3 to 4 months.
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Tips & Warnings
Use straw, not barley hay or freshly cut barley.
You can as much as double the quantity of barley straw if your pond is muddy or has a history of serious algae problems. More than this could be dangerous to fish.
Installing an aerator if you don't already have one may help to keep your fish healthy.
In very large ponds, use several large mesh bags and spread them out.
