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NT Labs Malachite

NT Labs Malachite

Regular price £12.99
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Koi Care Malachite Green from NT Labs treatment for fungus and external parasites in your pond.

External parasites such as Ichthyopthirius (White spot), Trichodina, Costia, Chilodonella, and Epistylis are frequent troublemakers in the fishpond. They attack and live in the mucous layer of the fish and can cause extensive damage to your fish, even causing fatalities.

For best results use Malachite Green along with NT Labs Formaldehyde to treat all types of fungal and parasitic infections. If combining treatments use 10ml to every 1600l of pond water.

NT Labs advise to only use this treatment twice, if symptoms persist speak to a pond fish specialist for more advice.

Symptoms of parasitic infection:

  • White patches
  • Fluffy white growths
  • Grey slimy appearance
  • Erratic swimming
  • Scratching against rocks and other decor

To treat these parasitic complaints use 10 ml of Malachite Green for every 176 UK gallons of (800 L) of pond water.

  • Experience

    We have over 40 years of experience in the industry

  • Koi Kare


    We are koi keepers too!

    We share the same passion as our customers

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    We are only a phone call or email away. Do not hesitate to ask us questions - we love sharing our knowledge!

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    We regularly review our pricing to make sure our rates are fair for our customers

Frequently Asked Questions

How Much Is Delivery?

Our delivery is free for any orders over £100.

For all orders under £100 delivery is £4.99.

How Do I Make A Return?

To start a return, you can contact us at If you have a valid return instructions will be made on how to make the return.

Please do not post a return without contacting us first.

What Is The Best Way To Contact You?

The best way to contact us is via our contact page here.

How Soon Will I Get A Refund If I Make A Return?

Refunds will be processed within 7 days of us receiving and checking the item.

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If you need advice or help with what products to buy, please reach out to us on our contact us page.