rm
Passport
- Family
- Snails
- Grows to
- 7 cm (2.8")
- Lives
- 1–2 years
- Temperament
- Peaceful
- Care
- Beginner
- Swims
- Everywhere
- Keep
- One is fine
- Water
- 15–30 °C (59–86 °F)
Care requirements
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On record for Bladder Snail: adult size, lifespan, minimum tank, temperature, ph, hardness, carbonate hardness, minimum group, diet, care level, swim level.
Not on record for Bladder Snail: tank length.
A figure that is not on record is left out rather than guessed. One marked Suggested comes from keeping knowledge rather than a page.
- Minimum tank 4 L / 1.0 US gal
- pH 6–9
- Hardness 0–30 dGH
- Carbonate hardness 0–25 dKH
- Diet omnivore / algae eater
Care notes written from general aquarium knowledge, not from the cited sources.
About
Bladder snails are the ones you didn't buy. They arrive as eggs on a bag of plants, and within a couple of months there are hundreds, which is why most keepers meet them as a problem rather than a pet.
They're worth reconsidering. Bladder snails eat leftover food, dead plant matter and algae; they don't damage healthy plants; and their population is a direct readout of how much surplus food is sitting in your tank. Blaming the snail for a bloom is like blaming the smoke alarm.
The shell coils to the left, which is unusual and the easiest way to tell them from the similar pond snails — hold one with the spire up and the opening faces left.
Tank setup
Bladder snails need nothing from you and will thrive in any tank you put them in. They're among the most adaptable animals in fresh water.
Hard water gives them better shells, as with every snail, and soft acidic water pits and thins them. It rarely stops them breeding.
They tolerate low oxygen, high nitrate and temperatures across the whole tropical range and below. A tank where only the bladder snails look happy is a tank with a problem.
Expect them on any plant you buy. Preventing arrival means a dip or a quarantine tank, and even then they get through.
Feeding
Bladder snails graze algae, biofilm, detritus, dead plants and uneaten fish food, and they find every bit of it themselves.
Never feed them on purpose. Their numbers rise to meet the food available, so extra feeding is what produces the explosion people complain about.
Cut feeding and siphon the substrate to reduce them. The population falls back within weeks, without any snail-killing product involved.
Avoid: copper in anything and avoid chemical snail treatments generally — they kill shrimp and other snails too, and they leave you with a tank full of decaying bodies that fouls the water badly.
Filtration and flow
Ordinary filtration is more than enough. They're indifferent to flow, oxygen and almost everything else.
Keep hardness reasonable for the sake of their shells.
They'll graze filter sponges and any wetted surface, which does no harm at all.
With plants
Bladder snails are safe with healthy plants. They lack the mouthparts to damage living tissue and they concentrate on the dead and dying.
Damage blamed on them is nearly always something else — a plant already melting, a nutrient deficiency, or a different snail. Watch what they're actually eating before you act.
Very large populations in an underfed tank will start on soft, weakened growth, so numbers are still worth managing.
Health
They're effectively indestructible and nothing much troubles them. Shell erosion in soft water is the only routine complaint.
They're as vulnerable to copper as any invertebrate, which is worth remembering if you value the shrimp sharing their tank.
Assassin snails, loaches and pufferfish all eat them enthusiastically, which is the usual biological answer if you want the numbers down.
Breeding
Bladder snails are hermaphrodites and can fertilise themselves, so a single individual arriving on a plant is enough to found a colony. That's the whole story of how they spread.
They lay small clear jelly capsules on glass, plants and hardscape, each holding several eggs, and they lay them constantly. The young hatch as miniature adults and mature in weeks.
There's no practical way to keep them out permanently and rarely a good reason to try. Manage the food supply and the population manages itself.
Tank mates
Avoid9
- Clown Loach Clown Loach is not safe with Bladder Snail: loaches and botia and snails are a bad pairing.
- Demasoni Cichlid Demasoni Cichlid is not safe with Bladder Snail: african cichlids and snails are a bad pairing.
- Dwarf Chain Loach Dwarf Chain Loach is not safe with Bladder Snail: loaches and botia and snails are a bad pairing.
- Electric Yellow Lab Electric Yellow Lab is not safe with Bladder Snail: african cichlids and snails are a bad pairing.
- Hillstream Loach Hillstream Loach is not safe with Bladder Snail: loaches and botia and snails are a bad pairing.
Only with care13
- Chinese Algae Eater Chinese Algae Eater is aggressive and Bladder Snail is peaceful.
- Convict Cichlid Convict Cichlid is aggressive and Bladder Snail is peaceful.
- Jewel Cichlid Jewel Cichlid is aggressive and Bladder Snail is peaceful.
- Bristlenose Pleco Bristlenose Pleco is a risk to Bladder Snail: bristlenose catfish and snails are a pairing to watch.
- Clown Pleco Clown Pleco is a risk to Bladder Snail: bristlenose catfish and snails are a pairing to watch.
No conflict is recorded with the other 82 species in the database, so nothing to flag. 4 species are not covered at all, so they could not be judged either way.