Quick answer: Malaysian trumpet snails (Melanoides tuberculata, also called red-rimmed melania or MTS) are small, cone-shaped freshwater snails that grow to about 1 inch (2.5 cm) in aquariums and live roughly 1 to 2 years. They spend the day buried in the substrate, eat leftover food, detritus and algae, and keep sand from compacting. They’re harmless to fish, shrimp and healthy plants. Most Malaysian trumpet snails reproduce without a mate and give birth to live babies, so one snail can start a whole colony. What most people get wrong is blaming the snails for an “infestation.” Big numbers only happen when there’s too much food, so fixing feeding controls them far better than chemicals.
Malaysian trumpet snail at a glance
| Detail | Malaysian trumpet snail |
|---|---|
| Scientific name | Melanoides tuberculata |
| Other names | MTS, red-rimmed melania, trumpet snail |
| Native range | Tropical and subtropical Africa and Asia |
| Adult size | About 0.75 to 1 in (2 to 2.5 cm) in aquariums, larger in the wild |
| Lifespan | About 1 to 2 years |
| Temperature | 64 to 86 F (18 to 30 C), best at 72 to 82 F |
| pH | 7.0 to 8.0 is best, tolerates about 6.5 |
| Hardness | Moderate to hard water for strong shells |
| Minimum tank | Any size from 5 gal (19 L) |
| Diet | Detritus, leftover food, algae, dead plant matter |
| Activity | Mostly at night. Buries in substrate by day |
| Reproduction | Mostly asexual. Gives birth to live young |
| Safe with | Fish, shrimp, other snails and healthy plants |
| Care level | Very easy |
Malaysian trumpet snail vs other common aquarium snails
| Snail | Shell shape | Size | How it breeds | Where you see it |
|---|---|---|---|---|
| Malaysian trumpet snail | Tall, pointed cone, tan with brown or reddish flecks | Up to about 1 in | Live young, no egg clutches | In the substrate, glass at night |
| Assassin snail | Pointed cone with bold yellow and brown stripes | Up to about 1 in | Single eggs in square capsules | Buried or hunting snails |
| Ramshorn snail | Flat coil, like a ram’s horn | Up to about 1 in | Jelly egg clutches | Plants, glass, decor |
| Bladder or pond snail | Small, rounded, thin shell | Up to about 0.5 in | Jelly egg clutches | Glass and plants |
| Nerite snail | Round, thick, often patterned | About 1 in | Hard white eggs that don’t hatch in freshwater | Glass, rocks, wood |
| Mystery snail | Large, round, with a trapdoor | Up to about 2 in | Pink or white clutches above the water | Everywhere |
Here’s the honest part most guides leave out. Malaysian trumpet snails are some of the most useful snails you can have, especially in sand and planted tanks. They tunnel through the substrate like earthworms, mixing it and eating waste before it rots. People only start calling them pests when there are hundreds on the glass at night, and that always means the tank has more food than the fish are eating. The snails are a symptom, not the cause.
Are Malaysian trumpet snails good or bad?
| Good | Bad |
|---|---|
| Stir and aerate sand and gravel, which stops it from compacting | Breed fast when there’s extra food |
| Eat leftover food, detritus and dead leaves | Very hard to remove completely once established |
| Don’t eat healthy plants | Can block filter intakes if numbers explode |
| Safe with fish, shrimp and other snails | Wild snails can carry parasites and are invasive if released |
| Act as a warning sign for bad water | Hard shells make them tough for snail-eating fish |
For most planted tanks, community tanks and shrimp tanks, they’re a net good. They’re a worse fit for show tanks where you never want to see a snail, or tanks with a deep, nutrient-rich soil you don’t want disturbed.
Appearance and identification
Malaysian trumpet snails have a long, narrow, pointed shell with up to about 10 whorls. The color is tan, light brown or olive with darker brown or rust-red speckles and streaks. The body is gray, and they have a trapdoor (operculum) that seals the shell.
Babies look like tiny adults, about 1 mm long, often seen on the glass at night.
How do Malaysian trumpet snails reproduce?
Mostly without a mate. Most Malaysian trumpet snails are females that reproduce by parthenogenesis, meaning they make young without mating. Males exist but are rare in aquarium populations.
Live birth, no egg clutches. The eggs develop inside a brood pouch, and the snail gives birth to tiny, fully formed snails. So if you see jelly egg clutches in your tank, they belong to another snail. Our aquarium snail eggs guide helps you tell whose they are.
How fast? A single adult can release a few to several dozen babies at a time, and young snails start breeding in a few months. With plenty of food, a handful of snails can turn into hundreds within a few months.
Tank setup and water parameters
Tank size. Any tank works, from a 5 gallon nano to large display tanks. They do especially well in 10 gallon and 20 gallon planted tanks.
Substrate. Sand or fine gravel lets them burrow. They’re most useful in sand, where they prevent dead spots and gas pockets.
Water hardness. Like all snails, they need calcium. Keep pH at 7 or above and add crushed coral or cuttlebone in soft water to avoid thin, pitted shells.
Cycled tank. They’re hardy, but add them to an established tank. See our how to cycle a fish tank guide.
No copper. Copper-based medications kill snails.
| Parameter | Ideal range |
|---|---|
| Temperature | 72 to 82 F (22 to 28 C) |
| pH | 7.0 to 8.0 |
| General hardness | 6 to 15 dGH or higher |
| Ammonia and nitrite | 0 ppm |
| Nitrate | Under 20 to 40 ppm |
What do Malaysian trumpet snails eat?
- Leftover fish food and sinking pellets
- Detritus and fish waste in the substrate
- Soft algae and biofilm
- Dead and melting plant leaves
In a normal community tank, you never need to feed them. If you keep them on their own, drop in a small piece of blanched zucchini or an algae wafer once or twice a week.
Do they eat plants? No, not healthy ones. They eat leaves that are already dying. If you see snails on a plant, that leaf was probably decaying already.
Are Malaysian trumpet snails safe with shrimp and fish?
Fish: yes. They can’t harm fish.
Shrimp: yes, including baby shrimp. They make a great cleanup crew in a shrimp tank alongside Amano shrimp and cherry shrimp.
Other snails: yes. They live peacefully with nerites, mystery snails and ramshorns.
Watch out for: snail-eating fish such as loaches and puffers will hunt them.
How to get rid of Malaysian trumpet snails or control them
Removing every single one is very hard, because they hide deep in the substrate and new ones are born ready to go. Aim for control, starting with the safest steps.
- Feed less. Only what your fish finish in about 2 minutes. This alone shrinks the population over a few weeks.
- Vacuum the substrate. Siphon detritus and uneaten food each week.
- Trap them at night. Put a blanched zucchini slice or algae wafer on a dish or in a mesh bag after lights-out, then lift it out in the morning with the snails on it.
- Pick them off the glass. They come up at night, so a flashlight check makes manual removal easy.
- Add assassin snails. They eat MTS, but slowly, since trumpets hide in the substrate. See our assassin snail guide.
- Snail-eating fish, like yoyo, zebra and clown loaches or pea puffers, only in tanks without shrimp and with enough space.
What not to do. Avoid copper and chemical snail killers. They also harm shrimp, and a mass die-off of hidden snails rots in the substrate and spikes ammonia.
Malaysian trumpet snails as a water quality warning
MTS normally stay buried during the day. If you suddenly see lots of them climbing to the waterline in daylight, something’s wrong:
- Low oxygen. Add surface agitation or an air stone.
- Ammonia or nitrite. Test the water and do a 30 to 50 percent water change.
- Rotting food or plants in the substrate. Vacuum and remove the source.
Think of them as a free early warning system for your fish.
A note before you buy
Malaysian trumpet snails are invasive in many parts of the world, and wild populations can carry parasites that affect fish and birds. Aquarium-bred snails from a clean tank are low risk, but never release aquarium snails, water or plants into ponds, lakes or rivers.
Common Malaysian trumpet snail problems
Hundreds on the glass at night. Too much food. Feed less and trap for a few weeks.
Snails crowding the waterline in daytime. Water quality or oxygen problem. Test the water now.
Thin, white or pitted shell tips. Low calcium or low pH. Add crushed coral or cuttlebone.
Empty shells everywhere. Some die of old age, since they only live 1 to 2 years. Lots at once can mean copper, a water problem or snail-eating fish.
Snails in the filter. Babies get pulled in. Add a sponge prefilter to the intake.
They came in on new plants. Very common. Dip or quarantine new plants if you don’t want them.
Tiny white worms in the substrate too. Usually detritus worms from the same extra food. Our detritus worms guide explains them.
FAQ
Are Malaysian trumpet snails bad for aquariums?
No. They clean up waste and aerate the substrate. They only become a nuisance when overfeeding lets their numbers explode.
What do Malaysian trumpet snails eat?
Leftover fish food, detritus, soft algae, biofilm and dead plant matter.
Do Malaysian trumpet snails lay eggs?
No visible eggs. They carry developing young in a brood pouch and give birth to tiny live snails.
Are Malaysian trumpet snails asexual?
Mostly, yes. Most are females that reproduce without mating, so a single snail can start a colony.
How do I get rid of Malaysian trumpet snails?
Feed less, vacuum the substrate, trap them at night with blanched vegetables, and add assassin snails. Avoid chemical snail killers.
What eats Malaysian trumpet snails?
Assassin snails, pea puffers and loaches like yoyo, zebra and clown loaches.
Do Malaysian trumpet snails eat plants?
No. They only eat dead and decaying plant matter, not healthy leaves.
How big do Malaysian trumpet snails get?
About 0.75 to 1 inch (2 to 2.5 cm) in most aquariums.
