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Tom from Desoto, Mo writes

Will Diquat Water Weed and Landscape Herbicide harm koi fish? Can I pour it in the pond for suspending algae?

What is the best way to get rid of cattails and keep them from coming back? Can I use this as a pre- emergent?

Answer:

We do not carry an algaecide or any other products that are safe to be used in koi ponds at this time. We would recommend that you contact a koi pond supplier in your area or possibly your local cooperative extension office for advice on what products to use.

Answer last updated on: 01/30/2018

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Diquat Water Weed and Landscape Herbicide

Diquat Water Weed and Landscape Herbicide

4.5 out of 5 stars

$44.98

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