Methylen Blue

Disinfecting and oxidising agent;

This product has disinfecting and oxidising properties. It is suitable for removal of mould, parasites and bacterial infections, especially for imported types of fish.

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Product Description


5 ml per 50 l water.


We ¨strongly recommend to increase water temperature by amount 2°C. Do not filter, turn the light off and increase the air circulation.
Then exchange half-volume of the water, clean the filter and apply START+ a BIOFILTR. 3 days after you may add 2/3 dose of FMC.


Volume / Weight Packing EAN
ml g oz ks
20  20  0,68  25  8594000251842
 100  100  3,38  10  8594000250494
 250  250  8,45  5  8594000251408
 500  500  16,91  3  8594000251415
 1000  1000  33,81  3  8594000250678
 5000  5000  169,07  1  8594000252177

Additional Information


A very popular water preparation agent, used especially for preventive treatment of fish, for instance after transport, after water changes, during feeding with plankton etc. In lower concentrations (very light colouration of water), it may be used to treat spawn of problematic fish. It is recommended always to use METHYLENE BLUE to treat freshly imported fish, weak fish or fish with apparent respiratory problems. This agent is suitable for the removal of moulds, parasites and initial stages of bacterial infections. It has an oxidizing effect.


Ichthyophthirius Multifilis, Oodinium, Costia, Tetrahymena, Trichodina.


Change 1/2 of the aquarium water volume with fresh water.

Remove and disinfect filters, filtration media and filter hoses.

Warm the aquarium water to 28-30°C.

On the 1st, 3rd and 6th day, following a previous change of 1/2 of water volume, apply a full dose.

On the 9th day, it is possible to add a half-dose of FMC without changing the water and feed the fish very moderately. If the fish eat, keep feeding them very moderately and gradually increase the doses to the original level.

During the treatment, do not filter, turn the light off, and provide intense air circulation. Never feed the fish.

Always finish the treatment fully, otherwise it is very likely that the contamination will recur.

When the treatment is finished, approximately on the 15th day, apply an appropriate dose of BIOFILTR to restore the function of filters and filtration media.

It is also recommended to use START+; it binds metals and favourably affects the restoration of biological balance in the aquarium.

To conclude the treatment, after a few days, apply an appropriate dose of ALOE GEL. It supports final healing and helps restore the protective mucus of fish.

The blue water colouration will disappear shortly. The growth of plants will be suspended temporarily.

METHYLENE BLUE is born very well by a clear majority of aquarium fish.


The product may stain clothes!

The agent is sold in a special container which prevents photodecomposition. However, store the product in a cool dark place and always out of the reach of children!

Observe basic hygienic rules when using this product. Do not eat, drink or smoke. When the agent comes into contact with mucous membranes, seek medical advice.

The product may stain clothes!


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