Organic Barley Straw 1 lb in mesh bag. Barley Straw encourages clearer, algae-free ponds and is safe for fish and flowering plants. It also works great for water troughs.
William E. Lynch Jr. Extension Associate, Aquatic Ecosystem Management, Ohio State University Filamentous algae is the moste common aquatic weed problem in ponds. Its "sudden" appearance as it floats off the bottom causes consternation to pond owners as it degrades the aesthetic and recreational value of their ponds. Additionally, large amounts of filamentous algae can lead to a fish kill if specific climatic conditions occur (see Ohio State University Extension Fact Sheet A-8-01. The decomposition of barley straw in water produces and releases many compounds, one of which may control algae populations. The chemical compound does not eliminate existing aigae cells but interferes with and prevents the growth of new algae cells. As "old" algae cells naturally die off, few new algae cells are produced and the algae populatoin is controlled as long as the compound is being produced.
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