Tetra Pond MediFin

Tetra Pond MediFin is a versatile veterinary medicine for the treatment of ornamental fish. Tetra Pond MediFin has an antiseptic effect when used against parasitic infestations, fungal infections, gill parasites and bacteria. Possible symptoms include whitish to yellowish, slimy or cotton-like coatings, ulcers, wounds, inflammation, blood spots, loss of skin and scales, cloudy eyes, fin rot, clouding of the mucous membranes, white mouths, loss of equilibrium and rubbing or scratching behaviour. For information on risks and side effects, strictly refer to the package leaflet and consult your veterinarian or specialist pet retailer.

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250ml

500ml

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A combination of active ingredients to treat the most common pond fish diseases


Tackles parasitic and bacterial diseases including infections, fungi and fin rot


Effective against wounds and all types of external injuries


Safe for all fish (except cartilaginous fish), amphibians and plants when used as directed. Exclude snails and mussels from the treatment


For information about risks and side effects, read the package leaflet and ask your veterinarian or pet retailer


Always keep this product out of the reach of children


More information

Tetra Pond MediFin is a concentrate for the preparation of a solution for the treatment of ornamental fish and is versatile in use. This veterinary medicinal product has an antiseptic effect when used against parasitic infestations, fungal infections, gill parasites and bacteria. Possible symptoms include whitish to yellowish, slimy or cotton-like coatings, ulcers, wounds, inflammation, blood spots, loss of skin and scales, cloudy eyes, fin rot, clouding of the mucous membranes, white mouths, loss of equilibrium and rubbing or scratching behaviour. Tetra Pond MediFin can be recognised by the dark green to blue colour of the liquid concentrate. For information on risks and side effects, please refer to the package leaflet and consult your veterinarian or specialist pet retailer. Please observe the following safety instructions: Intolerances may occur in cartilaginous fish (Chondrichthyes) and invertebrates. Snails, mussels and shrimp, as well as the affected fish species, should therefore be excluded from treatment. Do not use the product in the following cases: in the event of hypersensitivity to one or more of the active substances (see package leaflet); if the oxygen concentration in the garden pond is below 5 mg/l; if the gills of your ornamental fish already show clearly visible damage; if the animals are intended for food production. Tetra Pond MediFin must not be administered by pregnant women. When using Tetra Pond MediFin, avoid contact with skin, mucous membranes and eyes, as well as oral ingestion. Gloves should be worn when handling the product. Wash your hands with soap and water after use. If the product accidentally gets into the eyes, rinse them immediately and thoroughly with clean, running water. In the event of accidental ingestion, seek medical advice immediately and show the package leaflet or label. Always ensure good ventilation in rooms where the ingredient formaldehyde is being used. This veterinary medicinal product has a strong colouring effect. Therefore, avoid contact with clothing. Heavily contaminated clothing should be changed immediately and washed before being worn again. Tetra Pond MediFin must not be used in natural bodies of water. To minimise harmful effects of the ingredient malachite green oxalate on the environment, the pond water should be filtered with activated carbon after treatment and before a water change. It is prohibited to use Tetra Pond MediFin on animals other than the following pets: animals kept in aquariums or ponds that are not intended for food production. If you notice any side effects in your ornamental fish, inform your veterinarian. Please also note: The safety of this veterinary medicinal product during the pregnancy of ornamental fish has not been established. Its use is therefore not recommended throughout the entire gestation period. Important: Tetra Pond MediFin must not be used together with other medicines. It works best when used alone. The simultaneous use of water treatment products may impair the effectiveness of the veterinary medicinal product. For optimum results, please follow the instructions in the package leaflet: Shake the bottle well before use and add 50 ml of Tetra Pond MediFin per 1,000 L of garden pond water. Distribute the product evenly in the water, for example using a stick. The treatment lasts 4 to 7 days and begins with a single application on the first day. Over time, you will be able to observe the effect of the product. When treating Ichthyophthirius (white spot disease), repeat the application five days after the first dose. After completing the treatment, filter the water with activated carbon and ensure that your filter is not heavily soiled. As most diseases are caused by poor water quality, Tetra recommends checking the water parameters regularly, for example with the Tetra Pond Test 7in1. Your specialist pet retailer will be happy to advise you. In the event of an overdose, Tetra recommends changing 50% of the water and additionally filtering with activated carbon. During treatment, the filter should be operated in a separate container outside the garden pond in order to preserve the microorganisms it contains. Additional aeration of the pond, for example with the Tetra Pond APK 400, is also recommended. If aeration without an active filter is not possible, the device can be operated without filter material to ensure sufficient water movement. In this case, the filter material can be stored cool in a container with pond water. Avoid the use of UV clarifiers or activated carbon for water filtration during treatment with Tetra Pond MediFin. Tetra Pond MediFin should be stored protected from heat and direct sunlight. The storage temperature should be between 15 °C and 25 °C. Once opened, the product has a shelf life of six months and must not be used thereafter. Always keep Tetra Pond MediFin out of the reach of children. Disposal notice: Unused veterinary medicinal products must be disposed of at a hazardous waste collection point and must not be disposed of via wastewater or the sewage system.

Read more

FAQs

What is Tetra Pond MediFin and what is it used for?

Tetra Pond MediFin is a veterinary medicinal product for the treatment of ornamental pond fish. It has an antiseptic effect against parasites, fungal infections, gill parasites and bacterial infections. Typical symptoms include cotton-like coatings, ulcers, wounds, inflamed skin, bloody spots, fin rot and cloudy eyes. It can also be used when fish show rubbing or scratching behaviour. Correct identification of symptoms is essential for effective treatment. When in doubt, specialist retailers or veterinarians should be consulted. The liquid concentrate is recognisable by its dark green to blue colour.

How is Tetra Pond MediFin applied correctly?

Shake the bottle well before use and dose 50 ml per 1,000 L of pond water. Distribute the product evenly across the pond, for example using a stick. The treatment begins with a single application on day one and lasts 4 to 7 days. In the case of white spot disease (Ichthyophthirius), a second application is required five days after the first. Always follow the instructions in the package leaflet carefully.

Can Tetra Pond MediFin be combined with other treatments?

No, Tetra Pond MediFin works best when used alone. Tetra Pond MediFin must not be used together with other medicinal products. Combined use may reduce effectiveness or increase the risk of side effects. Also water conditioners should be avoided during treatment, as they may interfere with the medication.

Is Tetra Pond MediFin safe for all pond inhabitants?

No. The product must not be used with invertebrates, including snails and mussels. Cartilaginous fish (Chondrichthyes) may also show intolerance reactions and must be excluded from treatment. Only ornamental fish that are not intended for food production may be treated. Removing sensitive species before treatment is essential.

When must Tetra Pond MediFin not be used?

Do not use the product if the oxygen concentration in the pond is below 5 mg/L. It must also not be applied if fish show severe, clearly visible gill damage. The product must not be used in cases of hypersensitivity to the active ingredients. It is also prohibited for fish intended for food production. Pregnant women must not administer the product.

Why is additional aeration important during treatment?

During treatment, fish may require increased oxygen levels. Additional aeration supports respiration and recovery. Tetra strongly recommends using a pond air pump such as the Tetra Pond APK 400 during treatment. If aeration without an active filter is not possible, the filter can be operated without filter media to maintain water movement.

How should the pond filter be handled during treatment?

During treatment, the biological filter should ideally be operated in a separate container outside the pond to preserve beneficial microorganisms. UV clarifiers and activated carbon must not be used during treatment, as they reduce the effectiveness of Tetra Pond MediFin. After the treatment period, the pond water should be filtered with activated carbon to remove medication residues. Ensure the filter is clean but not heavily contaminated before restarting normal operation.

What should I do in case of overdosing with Tetra Pond MediFin?

In case of overdosing, immediately change 50% of the pond water. Additionally, filter the water using activated carbon to remove excess medication. Increase aeration and closely observe fish behaviour. Accurate dosing is essential to avoid unnecessary stress. If symptoms persist, consult a veterinarian.

Are there safety precautions for humans?

Yes. Contact with skin, eyes and mucous membranes must be avoided, and ingestion must not occur. Gloves should always be worn during handling, and hands should be washed thoroughly afterwards. The product is strongly staining and may permanently discolour clothing. Due to its formaldehyde content, ensure good ventilation when handling

How can the environmental impact of Tetra Pond MediFin be minimised?

Tetra Pond MediFin must never be used in natural bodies of water. After treatment, pond water should be filtered with activated carbon before any water change. This helps minimise environmental impact from malachite green oxalate residues. Unused product must be disposed of via hazardous waste collection. Disposal via wastewater or sewage systems is prohibited.

How should Tetra Pond MediFin be stored?

Store the product away from heat and direct sunlight at 15 °C to 25 °C. Once opened, the product is usable for six months only and must not be used afterwards. Keep the bottle tightly closed and out of reach of children. Improper storage may reduce effectiveness or safety.

How can fish diseases be prevented long-term?

Most fish diseases are caused by poor water quality and stress. Regular monitoring using tools such as Tetra Pond Test 7in1 help to detect problems early. Adequate filtration, aeration and responsible stocking levels are essential. Preventive care reduces the need for medication and supports long-term fish health. Specialist aquatic retailers can provide tailored advice.

Tetra Pond MediFin

Tetra Pond MediFin is a versatile veterinary medicine for the treatment of ornamental fish. Tetra Pond MediFin has an antiseptic effect when used against parasitic infestations, fungal infections, gill parasites and bacteria. Possible symptoms include whitish to yellowish, slimy or cotton-like coatings, ulcers, wounds, inflammation, blood spots, loss of skin and scales, cloudy eyes, fin rot, clouding of the mucous membranes, white mouths, loss of equilibrium and rubbing or scratching behaviour. For information on risks and side effects, strictly refer to the package leaflet and consult your veterinarian or specialist pet retailer.

Available sizes

250ml

500ml

1L

Buy Online

Loading...

Find a nearby store

Detail

A combination of active ingredients to treat the most common pond fish diseases


Tackles parasitic and bacterial diseases including infections, fungi and fin rot


Effective against wounds and all types of external injuries


Safe for all fish (except cartilaginous fish), amphibians and plants when used as directed. Exclude snails and mussels from the treatment


For information about risks and side effects, read the package leaflet and ask your veterinarian or pet retailer


Always keep this product out of the reach of children


More information

Tetra Pond MediFin is a concentrate for the preparation of a solution for the treatment of ornamental fish and is versatile in use. This veterinary medicinal product has an antiseptic effect when used against parasitic infestations, fungal infections, gill parasites and bacteria. Possible symptoms include whitish to yellowish, slimy or cotton-like coatings, ulcers, wounds, inflammation, blood spots, loss of skin and scales, cloudy eyes, fin rot, clouding of the mucous membranes, white mouths, loss of equilibrium and rubbing or scratching behaviour. Tetra Pond MediFin can be recognised by the dark green to blue colour of the liquid concentrate. For information on risks and side effects, please refer to the package leaflet and consult your veterinarian or specialist pet retailer. Please observe the following safety instructions: Intolerances may occur in cartilaginous fish (Chondrichthyes) and invertebrates. Snails, mussels and shrimp, as well as the affected fish species, should therefore be excluded from treatment. Do not use the product in the following cases: in the event of hypersensitivity to one or more of the active substances (see package leaflet); if the oxygen concentration in the garden pond is below 5 mg/l; if the gills of your ornamental fish already show clearly visible damage; if the animals are intended for food production. Tetra Pond MediFin must not be administered by pregnant women. When using Tetra Pond MediFin, avoid contact with skin, mucous membranes and eyes, as well as oral ingestion. Gloves should be worn when handling the product. Wash your hands with soap and water after use. If the product accidentally gets into the eyes, rinse them immediately and thoroughly with clean, running water. In the event of accidental ingestion, seek medical advice immediately and show the package leaflet or label. Always ensure good ventilation in rooms where the ingredient formaldehyde is being used. This veterinary medicinal product has a strong colouring effect. Therefore, avoid contact with clothing. Heavily contaminated clothing should be changed immediately and washed before being worn again. Tetra Pond MediFin must not be used in natural bodies of water. To minimise harmful effects of the ingredient malachite green oxalate on the environment, the pond water should be filtered with activated carbon after treatment and before a water change. It is prohibited to use Tetra Pond MediFin on animals other than the following pets: animals kept in aquariums or ponds that are not intended for food production. If you notice any side effects in your ornamental fish, inform your veterinarian. Please also note: The safety of this veterinary medicinal product during the pregnancy of ornamental fish has not been established. Its use is therefore not recommended throughout the entire gestation period. Important: Tetra Pond MediFin must not be used together with other medicines. It works best when used alone. The simultaneous use of water treatment products may impair the effectiveness of the veterinary medicinal product. For optimum results, please follow the instructions in the package leaflet: Shake the bottle well before use and add 50 ml of Tetra Pond MediFin per 1,000 L of garden pond water. Distribute the product evenly in the water, for example using a stick. The treatment lasts 4 to 7 days and begins with a single application on the first day. Over time, you will be able to observe the effect of the product. When treating Ichthyophthirius (white spot disease), repeat the application five days after the first dose. After completing the treatment, filter the water with activated carbon and ensure that your filter is not heavily soiled. As most diseases are caused by poor water quality, Tetra recommends checking the water parameters regularly, for example with the Tetra Pond Test 7in1. Your specialist pet retailer will be happy to advise you. In the event of an overdose, Tetra recommends changing 50% of the water and additionally filtering with activated carbon. During treatment, the filter should be operated in a separate container outside the garden pond in order to preserve the microorganisms it contains. Additional aeration of the pond, for example with the Tetra Pond APK 400, is also recommended. If aeration without an active filter is not possible, the device can be operated without filter material to ensure sufficient water movement. In this case, the filter material can be stored cool in a container with pond water. Avoid the use of UV clarifiers or activated carbon for water filtration during treatment with Tetra Pond MediFin. Tetra Pond MediFin should be stored protected from heat and direct sunlight. The storage temperature should be between 15 °C and 25 °C. Once opened, the product has a shelf life of six months and must not be used thereafter. Always keep Tetra Pond MediFin out of the reach of children. Disposal notice: Unused veterinary medicinal products must be disposed of at a hazardous waste collection point and must not be disposed of via wastewater or the sewage system.

Read more

FAQs

What is Tetra Pond MediFin and what is it used for?

Tetra Pond MediFin is a veterinary medicinal product for the treatment of ornamental pond fish. It has an antiseptic effect against parasites, fungal infections, gill parasites and bacterial infections. Typical symptoms include cotton-like coatings, ulcers, wounds, inflamed skin, bloody spots, fin rot and cloudy eyes. It can also be used when fish show rubbing or scratching behaviour. Correct identification of symptoms is essential for effective treatment. When in doubt, specialist retailers or veterinarians should be consulted. The liquid concentrate is recognisable by its dark green to blue colour.

How is Tetra Pond MediFin applied correctly?

Shake the bottle well before use and dose 50 ml per 1,000 L of pond water. Distribute the product evenly across the pond, for example using a stick. The treatment begins with a single application on day one and lasts 4 to 7 days. In the case of white spot disease (Ichthyophthirius), a second application is required five days after the first. Always follow the instructions in the package leaflet carefully.

Can Tetra Pond MediFin be combined with other treatments?

No, Tetra Pond MediFin works best when used alone. Tetra Pond MediFin must not be used together with other medicinal products. Combined use may reduce effectiveness or increase the risk of side effects. Also water conditioners should be avoided during treatment, as they may interfere with the medication.

Is Tetra Pond MediFin safe for all pond inhabitants?

No. The product must not be used with invertebrates, including snails and mussels. Cartilaginous fish (Chondrichthyes) may also show intolerance reactions and must be excluded from treatment. Only ornamental fish that are not intended for food production may be treated. Removing sensitive species before treatment is essential.

When must Tetra Pond MediFin not be used?

Do not use the product if the oxygen concentration in the pond is below 5 mg/L. It must also not be applied if fish show severe, clearly visible gill damage. The product must not be used in cases of hypersensitivity to the active ingredients. It is also prohibited for fish intended for food production. Pregnant women must not administer the product.

Why is additional aeration important during treatment?

During treatment, fish may require increased oxygen levels. Additional aeration supports respiration and recovery. Tetra strongly recommends using a pond air pump such as the Tetra Pond APK 400 during treatment. If aeration without an active filter is not possible, the filter can be operated without filter media to maintain water movement.

How should the pond filter be handled during treatment?

During treatment, the biological filter should ideally be operated in a separate container outside the pond to preserve beneficial microorganisms. UV clarifiers and activated carbon must not be used during treatment, as they reduce the effectiveness of Tetra Pond MediFin. After the treatment period, the pond water should be filtered with activated carbon to remove medication residues. Ensure the filter is clean but not heavily contaminated before restarting normal operation.

What should I do in case of overdosing with Tetra Pond MediFin?

In case of overdosing, immediately change 50% of the pond water. Additionally, filter the water using activated carbon to remove excess medication. Increase aeration and closely observe fish behaviour. Accurate dosing is essential to avoid unnecessary stress. If symptoms persist, consult a veterinarian.

Are there safety precautions for humans?

Yes. Contact with skin, eyes and mucous membranes must be avoided, and ingestion must not occur. Gloves should always be worn during handling, and hands should be washed thoroughly afterwards. The product is strongly staining and may permanently discolour clothing. Due to its formaldehyde content, ensure good ventilation when handling

How can the environmental impact of Tetra Pond MediFin be minimised?

Tetra Pond MediFin must never be used in natural bodies of water. After treatment, pond water should be filtered with activated carbon before any water change. This helps minimise environmental impact from malachite green oxalate residues. Unused product must be disposed of via hazardous waste collection. Disposal via wastewater or sewage systems is prohibited.

How should Tetra Pond MediFin be stored?

Store the product away from heat and direct sunlight at 15 °C to 25 °C. Once opened, the product is usable for six months only and must not be used afterwards. Keep the bottle tightly closed and out of reach of children. Improper storage may reduce effectiveness or safety.

How can fish diseases be prevented long-term?

Most fish diseases are caused by poor water quality and stress. Regular monitoring using tools such as Tetra Pond Test 7in1 help to detect problems early. Adequate filtration, aeration and responsible stocking levels are essential. Preventive care reduces the need for medication and supports long-term fish health. Specialist aquatic retailers can provide tailored advice.

Do you have a question about the product?

Do you have a question about the product?

Do you have a question?

Send

Your inquiry has been sent.

Available sizes
Buy online
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