Blue Post Horn Snail (Planorbella duryi)

09 September 2026

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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.

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