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Best Swim Bladder Treatment For Tropical Fish of 2026
Last updated on 09/01/2026
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1
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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9.9
Exceptional
Check Price
9.9
Exceptional
API
API MELAFIX Freshwater Fish Bacterial Infection Remedy 473 ml Bottle
Check Price
Show More
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
Show More
Value for Money
2
Interpet General Tonic Number 5 Aquarium Fish Treatment
Interpet
Why we love it
Keeps aquarium healthy.
Clear dosing instructions included.
Comes with measuring tools.
Main Highlights
Preventative treatment to keep your aquarium healthy
Easy to follow and complete dosing instructions contained
Measuring cup and pipette included
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9.8
Exceptional
Check Price
9.8
Exceptional
Interpet
Interpet General Tonic Number 5 Aquarium Fish Treatment
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Why we love it
Keeps aquarium healthy.
Clear dosing instructions included.
Comes with measuring tools.
Main Highlights
Preventative treatment to keep your aquarium healthy
Easy to follow and complete dosing instructions contained
Measuring cup and pipette included
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3
API Stress Coat Aquarium Water Conditioner, Fish , 473 ml Bottle
API
Why we love it
Makes tap water safe.
Protects and heals fish.
Contains soothing Aloe Vera.
Main Highlights
Contains one API stress coat Aquarium Water Conditioner 473 ml Bottle
Makes tap water safe and protects fish with dual-action formula
Removes chemicals from tap water that are harmful to fish
Replaces fish’s protective coat damaged by handling, shipping or fish fighting with healing power of Aloe Vera extract
Use when adding or changing water, when adding a fish and when fish are sick or injured
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9.8
Exceptional
Check Price
9.8
Exceptional
API
API Stress Coat Aquarium Water Conditioner, Fish , 473 ml Bottle
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Why we love it
Makes tap water safe.
Protects and heals fish.
Contains soothing Aloe Vera.
Main Highlights
Contains one API stress coat Aquarium Water Conditioner 473 ml Bottle
Makes tap water safe and protects fish with dual-action formula
Removes chemicals from tap water that are harmful to fish
Replaces fish’s protective coat damaged by handling, shipping or fish fighting with healing power of Aloe Vera extract
Use when adding or changing water, when adding a fish and when fish are sick or injured
Show More
4
Tetra AquaSafe to Turn Tap Water into Safe and Healthy Water for Fish and Plants, 500 ml
Tetra
Why we love it
Reduces fish stress effectively.
Protects fish skin & fins.
Promotes bacteria settlement quickly.
Main Highlights
Tetra AquaSafe makes tap water safe for fish and reliably protects fish and plants against harmful substances contained in the water
Its optimized vitamin B mix reduces any stress that fish may experience during water changes and therefore sustainably supports their health
Tailored to the special needs of fishes’ skin & fins; iodine supports vitality, magnesium promotes growth & well-being of fish & plants; natural plant extract protects fish gills & mucous membranes
The care product encourages the settlement and bioactivity of useful bacteria in the aquarium, which in turn ensure clean, healthy water; it dissolves quickly in the aquarium water
It is suitable for all freshwater & marine aquariums; when using Tetra AquaSafe in marine aquariums, however, the protein skimmer should be switched off to prevent large amounts of foam from forming
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9.6
Superb
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9.6
Superb
Tetra
Tetra AquaSafe to Turn Tap Water into Safe and Healthy Water for Fish and Plants, 500 ml
Check Price
Show More
Why we love it
Reduces fish stress effectively.
Protects fish skin & fins.
Promotes bacteria settlement quickly.
Main Highlights
Tetra AquaSafe makes tap water safe for fish and reliably protects fish and plants against harmful substances contained in the water
Its optimized vitamin B mix reduces any stress that fish may experience during water changes and therefore sustainably supports their health
Tailored to the special needs of fishes’ skin & fins; iodine supports vitality, magnesium promotes growth & well-being of fish & plants; natural plant extract protects fish gills & mucous membranes
The care product encourages the settlement and bioactivity of useful bacteria in the aquarium, which in turn ensure clean, healthy water; it dissolves quickly in the aquarium water
It is suitable for all freshwater & marine aquariums; when using Tetra AquaSafe in marine aquariums, however, the protein skimmer should be switched off to prevent large amounts of foam from forming
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5
NT Labs Aquarium Swimbladder Treatment, Tropical and Coldwater Aquarium Medicine, Treats Fish Buoyancy & Stability Issues, Treatment for Internal Bacterial Infections (100ml - Treats 500L)
NT Labs
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 and 9-aminoacridine HCl. 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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9.6
Superb
Check Price
9.6
Superb
NT Labs
NT Labs Aquarium Swimbladder Treatment, Tropical and Coldwater Aquarium Medicine, Treats Fish Buoyancy & Stability Issues, Treatment for Internal Bacterial Infections (100ml - Treats 500L)
Check Price
Show More
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 and 9-aminoacridine HCl. 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.
Show More
6
NT Labs Aquarium Swimbladder Treatment, Tropical and Coldwater Aquarium Medicine, Treats Fish Buoyancy & Stability Issues, Treatment for Internal Bacterial Infections (250ml - Treats 1250L)
NT Labs
26% Off
Why we love it
Targets internal bacterial infections.
Easy to use for everyone.
Effective active ingredients included.
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 and 9-aminoacridine HCl. 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.
Show More
9.5
Superb
Check Price
9.5
Superb
NT Labs
NT Labs Aquarium Swimbladder Treatment, Tropical and Coldwater Aquarium Medicine, Treats Fish Buoyancy & Stability Issues, Treatment for Internal Bacterial Infections (250ml - Treats 1250L)
26% Off
Check Price
Show More
Why we love it
Targets internal bacterial infections.
Easy to use for everyone.
Effective active ingredients included.
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 and 9-aminoacridine HCl. 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.
Show More
7
API Aquarium Antibacterial Remedy, Blue, 237 ml (Pack of 1)
API
38% Off
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
Show More
9.4
Superb
Check Price
9.4
Superb
API
API Aquarium Antibacterial Remedy, Blue, 237 ml (Pack of 1)
38% Off
Check Price
Show More
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
Show More
8
NT Labs Aquarium Anti-Fluke and Wormer, Tropical & Coldwater Aquarium Medicine, Treats Internal Worms, Combats External Parasites Such as Skin & Gill Flukes (20ml - Treats 2 Courses of 500L)
NT Labs
Why we love it
Highly effective worm treatment.
Easy to use formula.
Safe for all fish.
Main Highlights
【 POWERFUL CONTROL OF SKIN AND GILL FLUKES AS WELL AS INTERMAL WORMS 】: Fish (especially Discus species) are susceptible to internal worms. An obvious sign is when fish become very thin but continue to feed. Aquarium Anti-Fluke and Wormer is formulated to be used when fish become lethargic, fins are clamped, thin looking, gasping and showing signs of rubbing/irritation.
【 EFFECTIVE ACTIVE INGREDIENT 】: Aquarium Anti-Fluke and Wormer contains Flubendazole (1000 mg/100 ml). This ingredient makes it a powerful solution to eradicate flukes and internal worms. Caution, this product contains flubendazole and will kill snails, shrimps and other invertebrates.
【 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, increase aeration in the aquarium to maximum, use the pipette provided to add the required dose. The treatment can be repeated once a week up to 4 doses. Following these steps will allow you to maintain a healthy aquatic environment effortlessly!
【 HARMLESS TO FILTER, FISH AND PLANTS 】: While our Anti-Fluke and Wormer solution can occasionally turn your water cloudy, rest assured it is harmless to the filter bacteria and all species of fish and plants. If the water becomes cloudy, change 50% at a time until the cloudiness goes away.
【 PRAISED BY EXPERTS 】: Aquarium Anti-Fluke and Wormer has earned recognition for its effectiveness in treating flukes and worms. It has been endorsed by aquarists, such as Fish Shop Matt, and Practical Fishkeeping Magazine's Associate Editor Nathan Hill.
Show More
9.4
Superb
Check Price
9.4
Superb
NT Labs
NT Labs Aquarium Anti-Fluke and Wormer, Tropical & Coldwater Aquarium Medicine, Treats Internal Worms, Combats External Parasites Such as Skin & Gill Flukes (20ml - Treats 2 Courses of 500L)
Check Price
Show More
Why we love it
Highly effective worm treatment.
Easy to use formula.
Safe for all fish.
Main Highlights
【 POWERFUL CONTROL OF SKIN AND GILL FLUKES AS WELL AS INTERMAL WORMS 】: Fish (especially Discus species) are susceptible to internal worms. An obvious sign is when fish become very thin but continue to feed. Aquarium Anti-Fluke and Wormer is formulated to be used when fish become lethargic, fins are clamped, thin looking, gasping and showing signs of rubbing/irritation.
【 EFFECTIVE ACTIVE INGREDIENT 】: Aquarium Anti-Fluke and Wormer contains Flubendazole (1000 mg/100 ml). This ingredient makes it a powerful solution to eradicate flukes and internal worms. Caution, this product contains flubendazole and will kill snails, shrimps and other invertebrates.
【 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, increase aeration in the aquarium to maximum, use the pipette provided to add the required dose. The treatment can be repeated once a week up to 4 doses. Following these steps will allow you to maintain a healthy aquatic environment effortlessly!
【 HARMLESS TO FILTER, FISH AND PLANTS 】: While our Anti-Fluke and Wormer solution can occasionally turn your water cloudy, rest assured it is harmless to the filter bacteria and all species of fish and plants. If the water becomes cloudy, change 50% at a time until the cloudiness goes away.
【 PRAISED BY EXPERTS 】: Aquarium Anti-Fluke and Wormer has earned recognition for its effectiveness in treating flukes and worms. It has been endorsed by aquarists, such as Fish Shop Matt, and Practical Fishkeeping Magazine's Associate Editor Nathan Hill.
Show More
9
Fluval Aquaplus Water Conditioner 500 ml
Fluval
Why we love it
Reduces fish stress effectively.
Conditions tap water quickly.
Protects scales and fins.
Main Highlights
Reduces Stress for Fish
Complete tap water conditioner
Improves aquatic environments for tropical fish
Fluval Water Conditioner also coats scales and fins to protect against scrapes and cuts.
Show More
9.2
Superb
Check Price
9.2
Superb
Fluval
Fluval Aquaplus Water Conditioner 500 ml
Check Price
Show More
Why we love it
Reduces fish stress effectively.
Conditions tap water quickly.
Protects scales and fins.
Main Highlights
Reduces Stress for Fish
Complete tap water conditioner
Improves aquatic environments for tropical fish
Fluval Water Conditioner also coats scales and fins to protect against scrapes and cuts.
Show More
10
TAP Aquarium Doctor Swim Bladder Control 125ml
TAP Aquarium Doctor
Why we love it
Cures swimbladder infections effectively.
Safe for all fish species.
Suitable for cold and tropical fish.
Main Highlights
Cures bacterial swimbladder infections in ornamental fish
Harmless to filters and all species of fish and plants
For cold water and tropical freshwater ornamental fish only
Show More
9.1
Superb
Check Price
9.1
Superb
TAP Aquarium Doctor
TAP Aquarium Doctor Swim Bladder Control 125ml
Check Price
Show More
Why we love it
Cures swimbladder infections effectively.
Safe for all fish species.
Suitable for cold and tropical fish.
Main Highlights
Cures bacterial swimbladder infections in ornamental fish
Harmless to filters and all species of fish and plants
For cold water and tropical freshwater ornamental fish only
Show More
