Will a Snowball Pleco clean the algae in my tank?

No. Hypancistrus inspector is predominantly a carnivore. While they might occasionally nibble on biofilm, they will not clear algae from glass or decorations and must be fed a dedicated meaty diet.

What is the difference between L102 and L201?

Both are sold as Snowball Plecos. L102 (Hypancistrus inspector) grows larger (up to 16 cm) and has noticeably larger eyes and spots. L201 remains smaller (around 10-12 cm) and has smaller, more densely packed spots.

Can I keep multiple Snowball Plecos together?

Yes, but you must have a suitably large tank. Males are highly territorial over caves. Ensure there are more caves than there are plecos, placed at opposite ends of the aquarium to reduce aggression.

Why is my Snowball Pleco always hiding?

They are naturally nocturnal and crepuscular, meaning they prefer to sleep in dark caves during the day. Providing dim lighting or heavily shaded areas can encourage them to come out more frequently.

Do they need driftwood in their tank?

Unlike Panaque species, they do not eat wood to aid digestion. However, driftwood provides excellent hiding spots, helps buffer the water, and mimics their natural environment, making it highly recommended.

FreshwaterTropicalIntermediate

Snowball Pleco

Hypancistrus inspector

The Snowball Pleco (L102) is a strikingly patterned, relatively small catfish known for its contrasting white spots and large, expressive eyes.

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Ideal Conditions

Temperature: 22 – 29 °C
pH range: 5.5 – 7.5
Hardness: 1 – 15 dGH
Adult size: 14 – 16 cm
Standard 120L tank or larger footprint: 120 litres+
Lifespan: 10 – 15 years
Diet: Omnivorous with a strong carnivorous preference; requires sinking meaty foods.
Water flow: Moderate to strong
Preferred setup: Provide plenty of hiding spaces using driftwood, rocks, and specialised breeding caves.

About the Snowball Pleco

First described in 2002, Hypancistrus inspector earns its scientific name from its noticeably large eyes, appearing as though it is always 'inspecting' its surroundings. Reaching around 15 centimetres in length, it features a bold pattern of large white spots against a dark brown or black body. It is often confused with the smaller L201, but the true L102 has larger spots and a slightly more robust build. Because they inhabit the fast-flowing waters of the Casiquiare drainage in Venezuela, they appreciate a well-oxygenated aquarium environment.

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Is it right for your tank?

Check Snowball Pleco against a habitat you already keep. We compare water type, temperature, pH, adult size, group needs and everything living there.

Where Snowball Pleco comes from

Native range

South America, Orinoco River Basin, Rio Negro Basin

Countries / regions

Venezuela

Habitat

Fast-flowing, highly oxygenated rocky streams and rapids with submerged wood.

Primarily found in the upper Orinoco and the Casiquiare drainage which connects the Orinoco to the Rio Negro.

Similar species

Orinoco Angel Pleco L201
Hypancistrus sp.
Zebra Pleco L046
Hypancistrus zebra
King Tiger Pleco L066
Hypancistrus sp.
Gold Nugget Pleco L018
Baryancistrus xanthellus

We’re adding more full species guides as the catalogue grows.

Compatible tank mates

Reviewed guidance based on this species' recorded traits.

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Cardinal Tetra
Paracheirodon axelrodi
They occupy the middle to upper water column, thrive in similar warm, acidic water, and will not compete for bottom territory.
Great
Discus
Symphysodon spp.
The Snowball Pleco handles the high temperatures required by Discus perfectly and acts as an excellent, non-aggressive cleanup companion for meaty leftovers.
Great
Other Hypancistrus species
Hypancistrus spp.
Males will compete aggressively for caves and territory. Hybridisation is also a significant risk if keeping closely related species together.
Compatible with caution
Dwarf Shrimp
Neocaridina davidi
While generally peaceful, the Snowball Pleco has a carnivorous leaning and may opportunistically consume small shrimp during nocturnal foraging.
Compatible with caution
Large Aggressive Cichlids
Highly aggressive or large cichlids may harass the pleco, bite its fins, or prevent it from feeding properly.
Not recommended

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