Loading... Please wait...


From £10.99
  • Highly Effective Anti-Parasite Treatment

NT Labs Koi Care Malachite is an effective treatment for external parasite and fungus infections. When used together with formaldehyde it's activity is enhanced which means that less malachite can be used. High dose or frequently repeating dosing can damage the gills of the fish. If the required effect has not been achieved after two treatments, take further advice to establish the real cause of the problem.
Please note: The warnings on the label and handle the product with care. 250 ml treats 20,000 litres (4400 gallons)


see Learning Zone : Medicinal Treatment Rules


Available in the following variations:



1 Litre

2.5 Litre

Find a retailer

Find your nearest stockist of NT Labs products.

Find my Nearest Retailer
Select Product Price Quantity
Product Reviews
Dosage / Volume Calculator
Product Tips & Advice

Write a Review

0 Reviews Write a Review

Dosage / Volume Calculator

  • Round
  • Tank
  • Oval
  • Kidney

Please enter the required dimensions


0 Litres
0 US Gallons
0 Imperial Gallons

Dosage Required*



Dosage Calculator

If you already know the volume please enter it below to calculate dosage*

Select Units

Enter Volume Calculate Dosage Required* ml

* Always follow the instructions on the label. This calculator is intended to be used only as a guide to how much product you need to buy to treat your system. It does not take account of displacement caused by shelves, rocks and ornaments etc. and does not include the volume of any external filtration system. NT Laboratories Ltd. will not accept any responsibility for inaccuracies or misuse of this guide.

Product Tips & Advice

Can be used with Formaldehyde. To support the timeline for getting fish back to health, use Koi Care Parazoryne 7-10 days after treating with Malachite

You may also need...