NT LABS Koi Care Malachite Green 500ml (treat skin disease)

Description

Malachite treats fungus caused by Saprolegnia and common skin disease.
When to use :
When fish have white growths on the body, head or fins, which may contain some green or brown discolouration. Malachite can be used in conjunction with Formaldehyde to treat fungal infections more effectively.
How to use :

Test your water quality.
Mix the appropriate dosage in a clean bucket of pond water, pour evenly over the surface of the pond and leave for 7 days. Switch off UV filtration until treatment has been completed. Aerate the pond well during treatment.
If you feel a repeat dose is necessary, check your diagnosis carefully using the Diagnosis Tool; a different medication may be more suitable. Allow 7 days and perform a partial water change before re-treating or treating with a different medication.
Always treat when you have time to observe fish and take appropriate action in the unlikely event of a bad reaction.
If required, mix with Formaldehyde prior to adding to the pond, following the instructions above.

500ml treat 20000L . 5ml treat 200L

Composition :
Active Ingredients – Malachite Green 1.0% w/v
Do not use with orfe, rudd, tench or sturgeon/sterlet.
Do not use if the water temperature is above 30°C.
Do not use in hot, humid, thundery conditions.
Do not mix medications, other than combining with Koi Care Formaldehyde.

NT Labs Malachite Green for Fungus and Skin Disease on Koi

White cottony growths on a koi’s body or fins usually point to a Saprolegnia fungal infection, often appearing after an injury or a parasite outbreak has broken the skin. We carry NT Labs Malachite Green as a proven first response, treating fungus and many common skin diseases. The 500ml bottle suits larger ponds, and it can be used alongside formaldehyde-based treatments where infections prove stubborn.

Singapore’s year-round warmth keeps pond bacteria and fungi active in every season, so a small graze can turn into a visible problem within days. Always test your water first, since poor quality is frequently the real trigger. Mix the correct dose in a clean bucket of pond water and add it evenly. Malachite stains hands, clothing and porous surfaces, so handle it with care.

Treat the root cause as well as the symptom, and our koi disease treatment guide walks through diagnosis. Browse the full conditioners and medication range, and see our common fish diseases guide for context.