Barley straw does not kill existing algae, but it inhibits the new growth of algae. The exact mechanism is poorly understood, but it seems that barley straw, when exposed to sunlight and in the presence of oxygen, produces a chemical that inhibits algae growth.

Does barley straw remove algae?

Barley straw is effective in controlling only algae. It is not effective against higher plants, or vascular plants, such as duckweed, watermilfoil, or pondweed. Algae come in many different shapes.

Does barley help with algae in ponds?

When barley straw begins to decompose, it releases chemicals into the water that stunt the growth of algae, if used correctly. The addition of barley to the pond will cause the decomposition of the straw and when this reaches a certain stage, will begin reducing the algae in your pond.

Is barley straw good for fish pond?

Barley straw is an interesting way to clear pond water naturally, and research supports its clarifying properties. A small amount of algae growth is normal in most bodies of water, and in low quantities it can actually be beneficial to ponds and fish!

What naturally kills algae in ponds?

To get rid of algae in a pond, try planting more aquatic plants in your pond, like lily pads, cattails, or watercress, which will absorb the nutrients that algae needs to grow. You can also throw a small bale of barley straw into your pond, which will slowly kill any algae over the course of a few weeks while it rots.

How do you place barley straw in a pond?


Quote from video: Use one scoop of barley straw pellets for every 300 gallons of pond water your pond may become cloudy after. Application this is normal and should clear within 24 to 48 hours.

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