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Today's Deals
Best Cotton Wool Disease Treatment Fish of 2026
Last updated on 26/04/2026
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1
3 x 118ml API Fish First Aid Disease Treatment Bundle Fish Medication Bottle
API
Why we love it
Effective treatment for fish infections.
Specialized antifungal and antibacterial solutions.
Compatible with freshwater and saltwater.
Main Highlights
Contains 1 x 118ml API Pimafix Antifungal Fish Remedy for Fish Fungal Infections
Contains 1 x 118ml API Melafix Fish Remedy Antibacterial Treatment for Treating Infections in Fish
Contains 1 x 118ml API White Spot Cure Freshwater and Saltwater Fish Medication
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9.8
Exceptional
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9.8
Exceptional
API
3 x 118ml API Fish First Aid Disease Treatment Bundle Fish Medication Bottle
Check Price
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Why we love it
Effective treatment for fish infections.
Specialized antifungal and antibacterial solutions.
Compatible with freshwater and saltwater.
Main Highlights
Contains 1 x 118ml API Pimafix Antifungal Fish Remedy for Fish Fungal Infections
Contains 1 x 118ml API Melafix Fish Remedy Antibacterial Treatment for Treating Infections in Fish
Contains 1 x 118ml API White Spot Cure Freshwater and Saltwater Fish Medication
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Value for Money
2
NT Labs Pond Eradick, Pond Fish Medicine, Anti-Parasite & Fungus, Parasite Treatment for Pond Fish, Treatment for Fungal Infections (1 Litre)
NT Labs
9% Off
Why we love it
Treats parasitic and fungal infections.
Easy to calculate dosage.
Suitable for all aquarists.
Main Highlights
【TARGETS PARASITIC INFECTIONS】: A five-day course of treatment for when pond fish show symptoms of parasitic infections, such as irritation, flicking, gasping at surface, covered in thick opaque mucus or visible white spots on the body.
【TREATS FUNGAL INFECTIONS】: Use if fish show signs of a fungal infection which can appear as cotton wool-like growths on the body and as a preventative in early spring. Eradick can be applied directly to leeches and lice, and is safe to use if Pond Salt Plus is present in the water at ‘General Tonic’ level.
【EASY TO USE】:To work out the required dosage for your pond, simply calculate the volume of your pond in litres (length x width x depth (in cm)/1000) or alternatively, use our Online Dosage Calculator. Shake bottle well then mix the correct dose in a clean bucket of pond water, then pour evenly around the pond. Switch off UV for 10 days from first dose. Wait 10 days after final dose before repeating treatment or applying another treatment. Allow plenty of time to observe the fish and take action in the unlikely event of a reaction.
【EFFECTIVE ACTIVE INGREDIENTS】: Pond Eradick contains Malachite Green (500 mg/100ml) and Formaldehyde (4890 mg/100ml). These ingredients make it a powerful solution to treat Parasitic and Fungal infections.
【SUITABLE FOR ALL AQUARISTS】:Pond EradickTreatment’s ease of use means it is perfect for use by beginners and seasoned pond keepers alike
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9.7
Exceptional
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9.7
Exceptional
NT Labs
NT Labs Pond Eradick, Pond Fish Medicine, Anti-Parasite & Fungus, Parasite Treatment for Pond Fish, Treatment for Fungal Infections (1 Litre)
9% Off
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Why we love it
Treats parasitic and fungal infections.
Easy to calculate dosage.
Suitable for all aquarists.
Main Highlights
【TARGETS PARASITIC INFECTIONS】: A five-day course of treatment for when pond fish show symptoms of parasitic infections, such as irritation, flicking, gasping at surface, covered in thick opaque mucus or visible white spots on the body.
【TREATS FUNGAL INFECTIONS】: Use if fish show signs of a fungal infection which can appear as cotton wool-like growths on the body and as a preventative in early spring. Eradick can be applied directly to leeches and lice, and is safe to use if Pond Salt Plus is present in the water at ‘General Tonic’ level.
【EASY TO USE】:To work out the required dosage for your pond, simply calculate the volume of your pond in litres (length x width x depth (in cm)/1000) or alternatively, use our Online Dosage Calculator. Shake bottle well then mix the correct dose in a clean bucket of pond water, then pour evenly around the pond. Switch off UV for 10 days from first dose. Wait 10 days after final dose before repeating treatment or applying another treatment. Allow plenty of time to observe the fish and take action in the unlikely event of a reaction.
【EFFECTIVE ACTIVE INGREDIENTS】: Pond Eradick contains Malachite Green (500 mg/100ml) and Formaldehyde (4890 mg/100ml). These ingredients make it a powerful solution to treat Parasitic and Fungal infections.
【SUITABLE FOR ALL AQUARISTS】:Pond EradickTreatment’s ease of use means it is perfect for use by beginners and seasoned pond keepers alike
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3
Aquacadabra Vanquish Fungus & Bacteria Pond Disease Treatment Water Solution 1L
Aquacadabra
Why we love it
Effective against pond fungus.
Safe for wildlife ponds.
Enhances garden pond health.
Main Highlights
Aquacadabra Vanquish Fungus & Bacteria: a powerful solution that should be added when fungus appears in your pond.
Aquacadabra Vanquish Fungus & Bacteria pond water solution is perfect for problems in garden ponds.
Fungus and mould may reside all over your pond including rocks, plants and filters.
Vanquish Fungus & Bacteria is a powerful water solution that should be added when fungus appears.
Anti Fungus & Bacteria is very beneficial in wildlife ponds.
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9.6
Superb
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9.6
Superb
Aquacadabra
Aquacadabra Vanquish Fungus & Bacteria Pond Disease Treatment Water Solution 1L
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Why we love it
Effective against pond fungus.
Safe for wildlife ponds.
Enhances garden pond health.
Main Highlights
Aquacadabra Vanquish Fungus & Bacteria: a powerful solution that should be added when fungus appears in your pond.
Aquacadabra Vanquish Fungus & Bacteria pond water solution is perfect for problems in garden ponds.
Fungus and mould may reside all over your pond including rocks, plants and filters.
Vanquish Fungus & Bacteria is a powerful water solution that should be added when fungus appears.
Anti Fungus & Bacteria is very beneficial in wildlife ponds.
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4
API PIMAFIX Antifungal Freshwater and Saltwater Fish Remedy 237 ml Bottle
API
Why we love it
Safely treats fish fungal infections.
Heals both internal and external infections.
Contains all-natural extract.
Main Highlights
Contains one (1) API PIMAFIX Antifungal Freshwater and Saltwater Fish Remedy 237 ml Bottle
Rapidly and safely treats fungal infections on body and fins of fish
Contains all-natural extract from West Indian Bay Trees to help with fungus and cottony growth
Helps heal internal and external bacterial infections in freshwater, saltwater and reef aquariums
Use daily for a week when treating infections
Please use API Melafix and Pimafix together for a more broad spectrum treatment.
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9.4
Superb
Check Price
9.4
Superb
API
API PIMAFIX Antifungal Freshwater and Saltwater Fish Remedy 237 ml Bottle
Check Price
Show More
Why we love it
Safely treats fish fungal infections.
Heals both internal and external infections.
Contains all-natural extract.
Main Highlights
Contains one (1) API PIMAFIX Antifungal Freshwater and Saltwater Fish Remedy 237 ml Bottle
Rapidly and safely treats fungal infections on body and fins of fish
Contains all-natural extract from West Indian Bay Trees to help with fungus and cottony growth
Helps heal internal and external bacterial infections in freshwater, saltwater and reef aquariums
Use daily for a week when treating infections
Please use API Melafix and Pimafix together for a more broad spectrum treatment.
Show More
5
API MELAFIX Freshwater Fish Bacterial Infection Remedy 473 ml Bottle
API
Why we love it
Heals infections efficiently.
Repairs damaged fins.
Natural, botanical extract included.
Main Highlights
Contains one API Melafix Freshwater Fish Bacterial Infection Remedy, 473 ml bottle
Heals bacterial infections and repairs damaged fins, ulcers and open wounds
Contains natural, botanical tea tree extract to quickly and rapidly help fish
Helps treat newly-introduced fish to reduce risk of disease outbreak in freshwater aquariums
Use daily for a week when treating infections and for 3 days as a preventive when adding new fish
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9.2
Superb
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9.2
Superb
API
API MELAFIX Freshwater Fish Bacterial Infection Remedy 473 ml Bottle
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Why we love it
Heals infections efficiently.
Repairs damaged fins.
Natural, botanical extract included.
Main Highlights
Contains one API Melafix Freshwater Fish Bacterial Infection Remedy, 473 ml bottle
Heals bacterial infections and repairs damaged fins, ulcers and open wounds
Contains natural, botanical tea tree extract to quickly and rapidly help fish
Helps treat newly-introduced fish to reduce risk of disease outbreak in freshwater aquariums
Use daily for a week when treating infections and for 3 days as a preventive when adding new fish
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6
Esha 2000 and Esha Exit Fungus Whitespot Aquarium Fish Treatment Finrot Bacteria Dropsy
CWA
Why we love it
Versatile treatment for aquarium issues.
Safe for all freshwater systems.
Comprehensive solution for fish health.
Main Highlights
eSHa 2000 is a versatile treatment for fungal, bacterial, and parasitic infections, helping to heal wounds, treat fin rot, ulcers, and other skin conditions in fish.
Effective for various aquarium problems, eSHa 2000 can treat diseases like dropsy, velvet disease, and gill inflammation, and can also be used as a preventative measure for quarantine or raising fry.
eSHa Exit targets white spot and other spot parasites, working quickly to eliminate these common issues while being gentle enough for sensitive tropical fish.
Safe for all freshwater systems, including coldwater and tropical tanks, eSHa 2000 and eSHa Exit are compatible with fish, plants, and shrimps, as well as filter bacteria.
Ideal combined treatment: When used together, eSHa 2000 and eSHa Exit provide a comprehensive solution to treat a wide range of aquarium diseases and promote overall fish health.
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9.0
Superb
Check Price
9.0
Superb
CWA
Esha 2000 and Esha Exit Fungus Whitespot Aquarium Fish Treatment Finrot Bacteria Dropsy
Check Price
Show More
Why we love it
Versatile treatment for aquarium issues.
Safe for all freshwater systems.
Comprehensive solution for fish health.
Main Highlights
eSHa 2000 is a versatile treatment for fungal, bacterial, and parasitic infections, helping to heal wounds, treat fin rot, ulcers, and other skin conditions in fish.
Effective for various aquarium problems, eSHa 2000 can treat diseases like dropsy, velvet disease, and gill inflammation, and can also be used as a preventative measure for quarantine or raising fry.
eSHa Exit targets white spot and other spot parasites, working quickly to eliminate these common issues while being gentle enough for sensitive tropical fish.
Safe for all freshwater systems, including coldwater and tropical tanks, eSHa 2000 and eSHa Exit are compatible with fish, plants, and shrimps, as well as filter bacteria.
Ideal combined treatment: When used together, eSHa 2000 and eSHa Exit provide a comprehensive solution to treat a wide range of aquarium diseases and promote overall fish health.
Show More
7
eSHa Hexamita
ESHA
Why we love it
Effective against multiple infections.
Safe for tropical fish.
Protects filter bacteria.
Main Highlights
For infestation with hexamita, octomitus (hole disease), mould formation and bacterial infections
Suitable for Discus and other tropical freshwater fish
The most common are gill worms, intestinal problems and skin infections
The disease can also spread unnoticed, so animals should always be well observed
When used properly, the product is protected by fish, plants and filter bacteria
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8.9
Excellent
Check Price
8.9
Excellent
ESHA
eSHa Hexamita
Check Price
Show More
Why we love it
Effective against multiple infections.
Safe for tropical fish.
Protects filter bacteria.
Main Highlights
For infestation with hexamita, octomitus (hole disease), mould formation and bacterial infections
Suitable for Discus and other tropical freshwater fish
The most common are gill worms, intestinal problems and skin infections
The disease can also spread unnoticed, so animals should always be well observed
When used properly, the product is protected by fish, plants and filter bacteria
Show More
8
API Pimafix, antifungal remedy for fresh and salt water fish
API
Why we love it
Treats multiple infections effectively.
Safe for all aquariums.
Maintains water quality perfectly.
Main Highlights
Treats fungal infections and both internal and external bacterial infections
Will not adversely affect the biological filter, alter the pH, or discolor water.
Safe for reef aquariums and live plants.
For use in fresh or salt water.
PimaFix has been formulated to work in combination with Melafix to enhance effectiveness against fish diseases.
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8.7
Excellent
Check Price
8.7
Excellent
API
API Pimafix, antifungal remedy for fresh and salt water fish
Check Price
Show More
Why we love it
Treats multiple infections effectively.
Safe for all aquariums.
Maintains water quality perfectly.
Main Highlights
Treats fungal infections and both internal and external bacterial infections
Will not adversely affect the biological filter, alter the pH, or discolor water.
Safe for reef aquariums and live plants.
For use in fresh or salt water.
PimaFix has been formulated to work in combination with Melafix to enhance effectiveness against fish diseases.
Show More
9
ESHA Aquarium Fish Tank Snail Killer Gastropex 10ml **Pack of Two***
ESHA
Why we love it
Pack of two convenience.
Safe for fish and plants.
Destroys all aquatic snails.
Main Highlights
FED UP of those snails taking over your tank!
**Pack of Two**
Safe to use with fish and plants.
Destroys all aquatic snails.
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8.7
Excellent
Check Price
8.7
Excellent
ESHA
ESHA Aquarium Fish Tank Snail Killer Gastropex 10ml **Pack of Two***
Check Price
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Why we love it
Pack of two convenience.
Safe for fish and plants.
Destroys all aquatic snails.
Main Highlights
FED UP of those snails taking over your tank!
**Pack of Two**
Safe to use with fish and plants.
Destroys all aquatic snails.
Show More
10
NT Labs Aquarium Anti-Ulcer & Finrot, Bacterial Infection Treatment, Relieves Fish Ulcers, Contains Acriflavine, Treats Bacteria such as Aeromonas & Pseudomonas (250ml - Treats 1250L)
NT Labs
7% Off
Why we love it
Protects fish from harmful bacteria.
Promotes rapid recovery from ulcers.
Safe for fish, plants, and filters.
Main Highlights
【 COMBAT BACTERIAL INFECTIONS 】: Certain species of bacteria, such as Aeromonas and Pseudomonas, cause fin, mouth and body tissue to be eaten away. Protect your fish from these harmful species with our highly-effective Anti-Ulcer & Finrot treatment. Early diagnosis is essential to prevent the infection becoming fatal.
【 RELIEVES FISH FROM ULCERS 】: Use our Aquarium Anti-Ulcer & Finrot when fish have red wounds, ulcers, missing scales, red blotches, rotting fins or eroded mouth tissue. Our specialised formula addresses these issues, promoting rapid recovery and preventing potential fatalities.
【 EASY TO USE 】: Simply calculate the volume of your aquarium in litres (length x width x depth in cm/1000) or use the NT Labs online Dosage Calculator. Shake the bottle thoroughly before use and mix required dose of treatment with 1 litre of aquarium water. Add slowly to aquarium. Follow these simple steps for optimal results.
【 HARMLESS TO FILTER, FISH AND PLANTS 】: While our Anti-Ulcer & Finrot solution will colour the water yellow, rest assured it is harmless to the filter bacteria and all species of fish and plants. Wait until the colour has faded, or at least 5 days, before carrying out water changes, except in an emergency.
【 POWERFUL ACTIVE INGREDIENTS 】: The active ingredients, including Acriflavine (60.2 mg/100 ml), 9-aminoacridine (60.2 mg/100 ml) and HCI Formaldehyde (1800 mg/100 ml), work together to combat infections. Trust in a product that prioritises the well-being of your fish and the health of your aquarium.
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8.7
Excellent
Check Price
8.7
Excellent
NT Labs
NT Labs Aquarium Anti-Ulcer & Finrot, Bacterial Infection Treatment, Relieves Fish Ulcers, Contains Acriflavine, Treats Bacteria such as Aeromonas & Pseudomonas (250ml - Treats 1250L)
7% Off
Check Price
Show More
Why we love it
Protects fish from harmful bacteria.
Promotes rapid recovery from ulcers.
Safe for fish, plants, and filters.
Main Highlights
【 COMBAT BACTERIAL INFECTIONS 】: Certain species of bacteria, such as Aeromonas and Pseudomonas, cause fin, mouth and body tissue to be eaten away. Protect your fish from these harmful species with our highly-effective Anti-Ulcer & Finrot treatment. Early diagnosis is essential to prevent the infection becoming fatal.
【 RELIEVES FISH FROM ULCERS 】: Use our Aquarium Anti-Ulcer & Finrot when fish have red wounds, ulcers, missing scales, red blotches, rotting fins or eroded mouth tissue. Our specialised formula addresses these issues, promoting rapid recovery and preventing potential fatalities.
【 EASY TO USE 】: Simply calculate the volume of your aquarium in litres (length x width x depth in cm/1000) or use the NT Labs online Dosage Calculator. Shake the bottle thoroughly before use and mix required dose of treatment with 1 litre of aquarium water. Add slowly to aquarium. Follow these simple steps for optimal results.
【 HARMLESS TO FILTER, FISH AND PLANTS 】: While our Anti-Ulcer & Finrot solution will colour the water yellow, rest assured it is harmless to the filter bacteria and all species of fish and plants. Wait until the colour has faded, or at least 5 days, before carrying out water changes, except in an emergency.
【 POWERFUL ACTIVE INGREDIENTS 】: The active ingredients, including Acriflavine (60.2 mg/100 ml), 9-aminoacridine (60.2 mg/100 ml) and HCI Formaldehyde (1800 mg/100 ml), work together to combat infections. Trust in a product that prioritises the well-being of your fish and the health of your aquarium.
Show More
