Best Fish Medication of 2025
Last updated on 20/09/2025
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Best Choice
1
eSHa 2000 - Fungus, Finrot and Bacteria Treatment *Pack Of Two*
Ace Canine
Free Shipping
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Ace Canine
eSHa 2000 - Fungus, Finrot and Bacteria Treatment *Pack Of Two*
Free Shipping
Why we love it
- Effective for fungus and bacteria.
- Two packs for value.
- Trusted brand for aquariums.
Main Highlights
- eSHa 2000 Fungus Finrot and Bacteria Treatment Pack Of Two
- Pet Supplies Fish Aquatic Pets Aquariums Accessories Water Treatments
- Product Type: AQUARIUM POND WATER TREATMENT
- Brand: eSha
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Value for Money
2
API PIMAFIX Antifungal Freshwater and Saltwater Fish Remedy 237 ml Bottle
API
24% OffFree Shipping
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API
API PIMAFIX Antifungal Freshwater and Saltwater Fish Remedy 237 ml Bottle
24% OffFree Shipping
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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3
ESHA AQUARIUM Water Treatment MEDICATION Test Strip FISH TANK TROPICAL MARINE (ESHA 2000)
ESHA
ESHA
ESHA AQUARIUM Water Treatment MEDICATION Test Strip FISH TANK TROPICAL MARINE (ESHA 2000)
4
Blagdon Extra Strength Concentrated Formula Anti Fungus & Bacteria Water Treatment for Pond Fish, Finrot, Mouthrot, Goldfish, Koi, Carp, 250 ml
Blagdon
11% OffFree Shipping
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Blagdon
Blagdon Extra Strength Concentrated Formula Anti Fungus & Bacteria Water Treatment for Pond Fish, Finrot, Mouthrot, Goldfish, Koi, Carp, 250 ml
11% OffFree Shipping
Why we love it
- Effective concentrated fungal treatment.
- Ensures safe dosage levels.
- Wildlife-friendly pond care.
Main Highlights
- EFFECTIVE CONCENTRATED FORMULA -use for treating goldfish, koi and carp pond fish for fungal and external bacterial infections such as: cotton wool fungus, fin rot and mouth rot fungus
- SAFE DOSAGE LEVELS - this treatment is designed to be added over a 5-day period to build up dosage levels for best results
- WILDLIFE SAFE - Blagdon Anti-Fungus and Bacteria Treatment is safe for treating all goldfish, koi and carp and is also safe for wildlife
- SHAKE BOTTLE WELL - shaking the bottle well before ensures the active ingredients are mixed correctly for best results for a fast fish recovery time (treat at first signs of infection). Discolouration of your pond water should be expected, but this only lasts for a few hours!
- ACCURATE NO MESS DOSING CHAMBER - just calculate the amount required for your pond, squeeze the required amount into the dosing chamber and administer according to instructions on bottle (this bottle treats 2,273 litres over the 5 day period)
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5
NT Labs Pond Bacterad, Pond Fish Medicine, Anti-Ulcer Fin-Rot & Flukes, Use When Fish Show Symptoms of Fin Rot, Mouth Rot, Red Blotches, Missing Scales or Clamped Fins
NT Labs
11% Off
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NT Labs
NT Labs Pond Bacterad, Pond Fish Medicine, Anti-Ulcer Fin-Rot & Flukes, Use When Fish Show Symptoms of Fin Rot, Mouth Rot, Red Blotches, Missing Scales or Clamped Fins
11% Off
Why we love it
- Targets bacterial infections effectively.
- Treats flukes safely.
- Suitable for all pondkeepers.
Main Highlights
- 【TARGETS BACTERIAL INFECTIONS】:Bacterad is formulated for use when pond fish show symptoms of bacterial infections such as ulcers, split fins, fin rot, mouth rot, red blotches, missing scales or clamped fins.
- 【TREATS FLUKES】:Bacterad can be used to treat flukes (trematodes) in the presence of sensitive species such as sturgeon, orfe and rudd, 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, and then pour evenly around the pond. Switch off UV for 10 days. Wait 10 days before repeating treatment or applying a different treatment. Allow plenty of time to observe the fish and act in the unlikely event of a reaction.
- 【EFFECTIVE ACTIVE INGREDIENTS】: Pond Bacterad contains Acriflavine (80 mg/100ml), Aminoacridine HCl (80 mg/100ml), Formaldehyde (2260 mg/100ml). These ingredients make it a powerful solution to treat bacterial infections in pond fish.
- 【SUITABLE FOR ALL POND KEEPERS】:Pond Bacterad’s ease of use means it is perfect for use by beginners and seasoned pond keepers alike.
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6
API Aquarium Antibacterial Remedy, Blue, 237 ml (Pack of 1)
API
38% OffFree Shipping
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API
API Aquarium Antibacterial Remedy, Blue, 237 ml (Pack of 1)
38% OffFree Shipping
Why we love it
- Heals infections, repairs fish damage.
- Rapid help with natural extracts.
- Preventive treatment for new fish.
Main Highlights
- Contains one (1) API MELAFIX Freshwater Fish Bacterial Infection Remedy 237 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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7
API White Spot Cure Freshwater and Saltwater Fish Medication, 118 ml - Packaging May Vary
API
10% OffFree Shipping
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API
API White Spot Cure Freshwater and Saltwater Fish Medication, 118 ml - Packaging May Vary
10% OffFree Shipping
Why we love it
- Quickly eliminates itch parasites.
- Effective treatment for fish infections.
- Safe for freshwater and saltwater.
Main Highlights
- Contains one API White Spot Cure Freshwater and Saltwater Fish Medication, 118 ml bottle
- Treats itch white spot disease in fish and secondary bacterial fish infections
- Quickly kills itch parasite, typically within 24 hours of first dose
- Use only in freshwater and saltwater aquariums not with reef aquariums
- Dose every day for 5 days when symptoms first start occurring
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8
NT Labs Aquarium Swimbladder Treatment, Tropical and Coldwater Aquarium Medicine, Treatment for Internal Bacterial Infections, Treats fish buoyancy and stability issues (100 ml)
NT Labs
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NT Labs
NT Labs Aquarium Swimbladder Treatment, Tropical and Coldwater Aquarium Medicine, Treatment for Internal Bacterial Infections, Treats fish buoyancy and stability issues (100 ml)
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Why we love it
- Effective for swimbladder treatment.
- Endorsed by expert aquarists.
- Easy for all users.
Main Highlights
- 【 TARGETS INTERNAL BACTERIAL INFECTIONS THAT CAUSE IRREGULAR SWIMMING BEHAVIOR】: Fish use their swimbladder for buoyancy and stability. When it becomes infected with Aeromonas or Pseudomonas bacteria, it can cause stress, which may result in death. Use Swimbladder Treatment when fish become lethargic, have clamped fins, are unstable in the water, hanging at the surface or lying on the bottom.
- 【 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, mix required dose of treatment with 1 litre of aquarium water, add slowly to aquarium. Treatment can be repeated 7 days after last dose. If you feel a second dose is required, first check your diagnosis is correct, test your water quality using NT Labs Test Kits and carry out a 30% partial water change. Following these steps will allow you to maintain a healthy aquatic environment effortlessly!
- 【 EFFECTIVE ACTIVE INGREDIENTS 】: Aquarium Swimbladder Treatment contains Acriflavine (80 mg/100 ml) and 9-aminoacridine HCl (800 mg/100 ml). These ingredients make it a powerful solution to treat internal bacterial infections which cause irregular swimming behaviour.
- 【 PRAISED BY EXPERTS 】: Aquarium Swimbladder Treatment has earned recognition for its effectiveness in treating swimbladder issues. It has been endorsed by aquarists, such as Fish Shop Matt, and Practical Fishkeeping Magazine's Associate Editor Nathan Hill.
- 【 SUITABLE FOR ALL AQUARISTS 】: Aquarium Swimbladder Treatment’s ease of use means it is perfect for use by beginners and seasoned aquarists alike.
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9
API Melafix 118Ml
API
25% OffFree Shipping
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API
API Melafix 118Ml
25% OffFree Shipping
Why we love it
- Compatible with diverse environments.
- Safe for biological filtration.
- Maintains stable pH levels.
Main Highlights
- Suitable for freshwater and marine
- Will not adversely affect the biological filter, alter the pH,
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10
NT Labs Aquarium Anti White Spot and Fungus Treatment, Cures White-Spot Disease, Treats Fish Fungus, Freshwater Aquarium Medicine, 100ml Treats 500 litres (100ml)
NT Labs
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NT Labs
NT Labs Aquarium Anti White Spot and Fungus Treatment, Cures White-Spot Disease, Treats Fish Fungus, Freshwater Aquarium Medicine, 100ml Treats 500 litres (100ml)
Free Shipping
Why we love it
- Combats white spot effectively.
- Relieves fish from irritation.
- Safe for all aquarium inhabitants.
Main Highlights
- 【 WHITE SPOT TREATMENT 】: White spot is a protozoan parasite; the adults live on the fish and appear as tiny white spots. The adult has a complex life cycle which results in hundreds of free-swimming juveniles looking for a host fish to infest. Combat white spot and fungus in your aquarium with our specialised Aquarium Anti-White Spot & Fungus solution, containing two active ingredients - Malachite Green (140 mg/100 ml) and Formaldehyde (800 mg/100 ml).
- 【 RELIEVES FISH FROM IRRITATION 】: Easily identify when to use the treatment by observing small white spots resembling grains of salt on your fish. If your fish show signs of irritation, rubbing against objects, exhibit a grey, velvety film or have white cotton wool-like growths on their body/mouth/ fins, our treatment is the perfect solution.
- 【 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. Changing water between doses is not recommended, except in an emergency. Follow these simple steps for optimal results.
- 【 7-DAY COURSE OF TREATMENT 】: Designed as a 7-day course of treatment, our powerful solution efficiently targets protozoan parasites, providing comprehensive relief for your fish. Adding the first dose to the aquarium is day 1. Repeat the dose on days 3, 5, and 7. After the 7th day, wait 7 days before a partial water change. Repeat or use another medication as needed, following the same dosing schedule.
- 【 NON-TOXIC TO SNAILS, SHRIMP AND FISH 】: The concentration of the product is non-toxic to snails, shrimp and fish, etc. All of the medication in our Aquarium range are formulated with sensitive species in mind. There's no need to use half doses, but if you think you have a particularly sensitive fish, you can always give the treatment as two halves given throughout the day. The solution will colour the water green but this should fade within a few days of the final dose being added.
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