Premium certified organic barley straw. Naturally safe for all pond life. 100% Barley Straw. Inhibit the growth of string algae. Best if added in the spring before algae growth starts. Tie bag near water movement for optimum efficiency. Keep straw submerged 1 - 3 feet. 8oz bundle treats 1000 gallons for a period of 3-4 months. Replace before completely disintegrated. Loose pack in mesh bag.

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