Submerged Oxygenator Pond Plants
Hornwort is a perfect addition to any Koi pond as it not only adds beneficial oxygen to your Koi pond, but it also provides a place for small fry to hide.
These plants are productive in the watergarden due to the fact that they compete with algae for the nutrients in the water and effectively reduce the amount of algae that will be able to grow helping to keep the water clear. You don't need to fertilize them because you want them to take advantage of the excess nutrients (nitrates) already present in your pond water.
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