NT Labs F-M-G Mixture

6 reviews

Treat the external parasites that are causing your pond fish and koi to suffer, using NT Labs F-M-G Mixture - a potent formula designed to eradicate such unwanted pests from your pond.


  • F-M-G Mixture 250ml Sale
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  • F-M-G Mixture 500ml Sale
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  • F-M-G Mixture 1LTR Sale
    code: 247 In Stock (Only 4 left!)
  • F-M-G Mixture 2.5 LTR Sale
    code: 248 In Stock (10+ Available)

Product Information

F.M.G Mixture from NT Labs. A mixture of Malachite green and Formaldehyde are the best combination to treat common external parasitic infections or Koi fungus infections.

This combined treatment cuts out the need for separate medications, just one dose for five days builds up the level of treatment for best effect. It kills all swimming and developing ecto-parasites, reducing the risk of infection in Koi and other pond fish.

Due to the strength of the treatment it only needs to be applied once. However this means it is dangerous to use in ponds containing sensitive fish such as Sterlet, Tench, Rudd or Orfe.

For these species use New wave Eradick, which is a weaker treatment, and must be applied on alternate days for 5 days.

  • 10ml Treats 364ltr

Instructions for use...

  • Switch off UV untill all the colour of the treatment has gone from your pond.
  • Wait 10 days after the final dose before treating with any other pond medication.
  • If you feel that a repeat dose is necessary, check your diagnosis carefully, a different medication may be more suitable.
  • DO NOT treat with water temperatures below 10 degrees or over 30 degrees.
  • Remove any Carbon or Zeolite from the filter or pond.
  • Top up your filter with live bacteria as treatments damages filter bacteria.

Product Specification

Product Treats Size
NT Labs F-M-G Mixture 250ml 9100ltr/2000gal 250ml
NT Labs F-M-G Mixture 500ml 18200ltr/4000gal 500ml
NT Labs F-M-G Mixture 1LTR n/a n/a
NT Labs F-M-G Mixture 2.5 LTR n/a n/a

Latest Customer Reviews

  • Rating
    Date 03/06/2019 18:06pm
    NT Labs F-M-G Mixture 1LTR
    Feefo Logo
    Works every time I have used this
  • Rating
    Date 24/04/2019 05:04am
    NT Labs F-M-G Mixture 250ml
    Feefo Logo
    Great product and good price
  • Rating
    Date 13/08/2018 05:08am
    NT Labs F-M-G Mixture 500ml
    Feefo Logo
    It's from NT lads. It works
  • Rating
    Date 13/03/2018 10:03am
    NT Labs F-M-G Mixture 1LTR
    Feefo Logo
    price is better than most other suppliers Amazon and ebay etc.
    and free delivery
  • Rating
    Date 06/02/2018 07:02am
    NT Labs F-M-G Mixture 2.5 LTR
    Feefo Logo
    Worst service ever, I didn't received the item I ordered.
  • Rating
    Date 09/06/2017 10:06am
    NT Labs F-M-G Mixture 2.5 LTR
    Feefo Logo
    Used this before always does what it claims
  • Rating
    Date 24/05/2016 17:05pm
    NT Labs F-M-G Mixture 500ml
    Feefo Logo
  • Rating
    Date 14/11/2014 23:11pm
    NT Labs F-M-G Mixture 500ml
    Feefo Logo
    Product was fine but price and delivery not particularly keen. I have been spending less with Swell as a result.
  • Rating
    Date 14/11/2014 16:11pm
    Fish Mate 3000 Pond Pump
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