Ramshorn Snail

Planorbella duryi

Also sold as Planorbella · Planorbis · Ram's horn snail · Ramshorn

Synonyms Red ramshorn · Blue ramshorn · Rams horn · Pink ramshorn · Leopard ramshorn · Helisoma duryi

Ramshorn Snail (Planorbella duryi) is a peaceful freshwater snail that reaches about 2 cm (0.8 in) and swims along the bottom. It wants 64–82°F (18–28°C) and pH 7–8, can be kept singly, and needs a tank of at least 5 L (1 gal).

At a glance

Type	Snail
Adult size	2 cm (0.8 in)
Minimum tank	5 L (1 gal)
Group size	Can be kept singly
Temperature	64–82°F (18–28°C)
pH	7–8
Temperament	Peaceful
GH	5–20
Lifespan	1–2 years
Eats shrimp	No

Before it goes in

Ramshorn Snail needs at least 5 L (1 gal). The smallest size in this library that clears that is the 30F Shallow.
It leaves shrimp and small fish alone.
It holds at 64–82°F (18–28°C). That shares a window with Betta and Cherry Shrimp.

What tank size does it need?

At least 5 L (1 gal). The smallest size here that clears it is the 30F Shallow.

Will it eat shrimp?

No — adult shrimp and their young are both safe with it.

What water does it want?

64–82°F (18–28°C), pH 7–8, GH 5–20.

How long does it live?

1–2 years in a tank that suits it. That is how long you are signing up for.

Good tank mates

Tank mates from this library that share its temperature window, are peaceful and eat neither it nor its young: Cherry Shrimp, Goldfish, Bristlenose Pleco, Celestial Pearl Danio and Molly.
Plants that hold up with it: Hygrophila corymbosa 'Siamensis', Water Sprite, Anubias nana 'Petite' and Cryptocoryne wendtii.

Often compared with

	Ramshorn Snail	Colombian Ramshorn Snail	Nerite Snail
Adult size	2 cm	5 cm	2.5 cm
Min tank	5 L	40 L	10 L
Group	1+	1+	1+
Temperature	64–82°F (18–28°C)	64–82°F (18–28°C)	68–82°F (20–28°C)
Eats shrimp	No	No	No

More livestock

Plan a tank with Ramshorn Snail →

Sources (5) · checked Sep 2026