Blue Post Horn Snail (Planorbella duryi)

09 September 2026

211

The blue post horn snail is a popular freshwater gastropod known for its striking shell coloration and active nature in home aquariums. As a color variant of the common ramshorn snail, it is highly valued by hobbyists for its algae-consuming habits and ease of care, making it a suitable addition to many community tank setups.

Taxonomy and Appearance

The blue post horn snail belongs to the family Planorbidae. These snails are characterized by their discoidal, coiled shells that resemble a ram's horn. The blue color variant often displays a translucent quality, sometimes revealing internal pigmentation or spotted patterns on the soft body tissues. They are generally peaceful and grow to a moderate size.

Habitat and Water Parameters

These snails are adaptable to a wide range of freshwater environments. They thrive in tanks with stable water conditions and prefer moderately hard water, which provides the necessary calcium for healthy shell development. While they can tolerate various temperatures, keeping them between 18 and 28 degrees Celsius ensures optimal metabolic activity.

Feeding and Plant Safety

Blue post horn snails are primarily detritivores and scavengers. They will graze on algae, decaying plant matter, and leftover fish food. They are generally considered safe for healthy aquarium plants, though they may consume dying or melting leaves. Supplementing their diet with blanched vegetables or calcium-rich sinking pellets can improve shell health.

Reproduction and Population Control

These snails are hermaphroditic and highly prolific breeders. They lay gelatinous egg clutches on hard surfaces, including glass and plants. Because they can reproduce rapidly in the presence of excess food, population control is best managed by limiting supplemental feeding and removing uneaten organic waste. Overfeeding the aquarium is the most common cause of population explosions.

Snail info

Related on Snails

Leave your comments

Latest on Snails

Pimpled Lace Snail (Melanoides granifera)

The pimpled lace snail, Melanoides granifera, is a burrowing freshwater snail from the family Thiaridae. It spends much of its time in substrate, emerging to graze on biofilm, detritus and leftover food. Its ridged, patterned shell adds interest to planted aquariums, while its live-bearing reproduction can gradually increase its numbers. It is generally peaceful and plant-safe when adequately fed, but should be kept under observation because identification and appearance can vary among imported aquarium stock.
Pink ramshorn snail (Planorbella duryi duryi)

The pink ramshorn snail is a freshwater planorbid recognized by its flat, coiled shell and pink to reddish body. The supplied name identifies it as Planorbella duryi duryi, a subspecies associated with the southeastern United States, although shell color alone cannot confirm an exact identification. It is peaceful, air-breathing, and useful as a scavenger in planted aquariums. Like many ramshorns, it can reproduce quickly when excess food and organic debris are available.
Piano Snail (Taia naticoides)

Taia naticoides is a freshwater, live-bearing snail sold under names such as piano snail. It has a rounded, banded shell and is valued as a grazer of algae and aquarium biofilm. The supplied photographs resemble this trade identification, but images alone cannot confirm species, age, or whether the specimen is a juvenile. Good calcium availability, stable alkaline water, and regular access to natural or supplemental food are important for long-term care.
Piano Snail (Taia naticoides)

The piano snail, also sold as the brush algae snail, is a large freshwater operculate snail with a rounded, banded shell. Taia naticoides is associated with Southeast Asian freshwater habitats and is valued for grazing surface growth and consuming organic debris. Aquarium identification can be complicated because common names are applied inconsistently; confirm the species with a reliable supplier. It is generally peaceful, plant-safe and live-bearing, but it needs mineral-rich water and should not be treated as a solution for heavy algae growth.
Orange Track Racing Snail (Vittina semiconica)

The Orange Track racing snail, Vittina semiconica, is a freshwater nerite valued for algae grazing and its patterned orange shell. It is generally peaceful, plant-safe and suitable for established community aquariums. Identification from shell pattern alone can be difficult because several Vittina and related nerite species resemble one another, so the supplied trade name should be treated as provisional unless confirmed by a specialist examination.
Orange Rock Snail (Orange Tylomelania)

The Orange Rock Snail is a trade name commonly used for orange-bodied Tylomelania, a group of freshwater snails associated with Sulawesi. Its dark, strongly ridged shell contrasts with the bright orange foot and head. Exact species identification is uncertain from the trade name and photographs alone, so care should follow general Tylomelania requirements. These snails are peaceful, active mainly at night, and best kept in mature, warm, alkaline aquariums with stable mineral content.
Orange Red Ramshorn Snail (Planorbella duryi duryi)

The orange red ramshorn snail is a freshwater planorbid recognized by its flat, coiled shell and brightly colored body. Planorbella duryi duryi is associated with freshwater habitats in the southeastern United States, especially Florida, although aquarium specimens may be selectively bred and their exact locality is often unknown. It is generally peaceful, useful as a grazer and scavenger, and capable of reproducing quickly when food is abundant.
Midnight Lady Snail (Vittina sp.)

The Midnight Lady Snail is a dark, patterned nerite sold under the aquarium trade name Midnight Lady Schnecke. It is identified here as Vittina sp., because the exact species cannot be confirmed from the supplied name and photograph alone. These snails are generally peaceful algae grazers for mature freshwater aquariums, but successful breeding requires conditions that are not normally present in freshwater tanks.
Ivory Predatory Snail: Anentome helena

The ivory predatory snail, commonly sold as Clea helena, is a freshwater assassin snail from Southeast Asia. It has a strongly ribbed, ivory to yellow-brown shell and a mottled gray-brown body. This active carnivore hunts or scavenges other small snails and accepts meaty foods in aquaria. It is generally plant-safe, but its predatory diet and egg-laying reproduction require planning when keeping it with ornamental snails or maintaining a controlled population.
Hedgehog Snail (Brotia armata)

The hedgehog snail, Brotia armata, is a large freshwater pachychilid recognized by its strongly ridged, spiny shell. It is a grazing and scavenging snail rather than a dedicated algae-control species, and it needs mature aquariums with clean, oxygenated water and adequate mineral content. Identification from photographs can be uncertain because several Brotia species have similar shell forms, so locality information is useful when confirming specimens.
Indian Malayan Louver Snail (Melanoides tuberculata)

Melanoides tuberculata is a small, conical freshwater snail commonly known in aquaria as the Malaysian trumpet snail. It spends much of the day burrowing through substrate and becomes more active after dark. This adaptable species consumes biofilm, algae, detritus and uneaten food, while generally leaving healthy plants alone. Its live-bearing reproduction can produce a large population when food is abundant. The name supplied for this article is retained, although common names vary and aquarium specimens may be confused with related thiarid snails.
Green staghorn snail (Clithon corona)

The green staghorn snail, Clithon corona, is a nerite snail valued for grazing algae and biofilm in freshwater aquariums. It is generally peaceful, plant-safe and unlikely to overpopulate in freshwater because its larvae normally require brackish or marine conditions. Provide mature surfaces for grazing, mineral-rich water and a secure lid. Identification can be difficult because aquarium trade names overlap among Clithon species, so the supplied name should be treated as a probable identification rather than a definitive one.
Geweihschnecke Tricolor (Clithon sp.)

Geweihschnecke Tricolor is a trade name for a colourful horned nerite in the genus Clithon. Exact species identification is uncertain because several closely related Clithon species and colour forms are sold under similar names. These small algae-grazing snails suit mature freshwater aquariums with stable, mineral-rich water. They are generally peaceful, plant-safe and unable to establish a large population in ordinary freshwater, although they may leave small white egg capsules on hard surfaces.
Geweihschnecke Red Venom (Clithon sowerbianum)

The Red Venom Geweihschnecke is a striking horned nerite sold for freshwater aquariums. Its dark shell, red-orange bands and small projections make it distinctive, although trade names and shell patterns can overlap among Clithon species. It is mainly a grazer of algae and biofilm, is generally safe with healthy plants, and usually cannot establish a self-sustaining population in freshwater because its larvae require different conditions.
Geweihschnecke Volcano Red (Clithon sowerbianum)

The Volcano Red Geweihschnecke is a small freshwater nerite-type snail sold under the scientific name Clithon sowerbianum. Its shell commonly shows red, orange, brown, and dark patterns, with horn-like projections in some individuals. It grazes algae and biofilm from hard surfaces without normally damaging healthy plants. Identification and the exact validity or spelling of the supplied scientific name should be treated with some caution because aquarium trade names and Clithon nomenclature are not always used consistently.
Yellow Baby Poso Snail, Tylomelania sp.

The Yellow Baby Poso Snail is a juvenile Tylomelania identified in the trade as Tylomelania sp. Its yellow to golden body contrasts with a dark, strongly ribbed shell. The “Poso” name suggests a Sulawesi lake lineage, but the exact species and locality cannot be confirmed from the supplied trade name or photographs alone. This is a freshwater snail for warm, mineral-rich aquariums and should be kept with peaceful tank mates that will not damage its soft body or feelers.