• 250ml (treats 2000 gallons)
• 500ml (treats 4000 gallons)
• 1 Litre (treats 8000 gallons)
• 2.5 Litres (treats 20,000 gallons)

NT LABS koi care FMG Mixture: Formaldehyde and Malachite green mix. Malachite green and formaldehyde are the best treatment for common external parasitic infections. Instead of using these two medications separately and worrying about the incorrect dosing and 5 day courses etc then why not use this (FMG MIXTURE).This is a very strong mixture of the 2 anti-parasite agents that are applied to the pond or treatment tank only once.The treatment lasts the full 5 days required to kill all free swimming and emergent ecto parasites.CAUTION: due to the strength of this treatment it only needs to be applied once.Also as its so strong do not use with sensitive fish like orfe, sterlets, tench and rudd etc.