Description
The Deminus Angelicus Pleco (Hypancistrus sp. L136), often referred to as the L136 Pleco, is a striking freshwater species highly valued in the aquarium trade for its bold contrast of deep black and creamy-white or yellowish markings. Native to the Rio Demini and Rio Negro tributaries of the Amazon Basin in Brazil, this pleco is part of the Hypancistrus genus, known for its smaller size, attractive patterns, and peaceful disposition.
This species prefers a dimly lit, well-oxygenated environment with clean, soft water. Though commonly mistaken for similar Hypancistrus variants, true L136 specimens display distinct blotched or reticulated patterns rather than defined stripes. Its compact size and manageable care requirements make it suitable for both specialised pleco setups and peaceful community aquariums.
Features of Deminus Angelicus Pleco (L136)
• Origin: Rio Demini and Rio Negro, Brazil
• Adult size: Up to 15 cm
• Temperament: Peaceful, shy
• Lifespan: 8–10 years
• Colour: Black with white, cream or yellow blotches or reticulated patterns
• Difficulty: Moderate
• Nocturnal: Most active at night
The best aquarium size for Deminus Angelicus Pleco (L136)
A minimum aquarium size of 100 litres is recommended for a single L136. For multiple specimens or mixed bottom-dwelling species, 150 litres or more provides sufficient space and reduces territorial stress. Ensure plenty of shaded areas and hiding spots.
Tank Mate Compatibility for Deminus Angelicus Pleco
This species is peaceful and can be housed with other calm, non-aggressive freshwater fish. Ideal tank mates include:
• Rummy Nose Tetra
• Bolivian Ram
• Congo Tetra
• Corydoras Catfish
• Pearl Gourami
Diet for Deminus Angelicus Pleco (L136)
L136 is an omnivorous species with a preference for protein-rich foods. Provide a varied diet including:
• Sinking carnivore pellets
• Frozen bloodworms and brine shrimp
• Algae wafers (occasional)
• Fresh vegetables like zucchini or cucumber
Feed once daily after lights are off to match their nocturnal habits.
Aquarium Setup Deminus Angelicus Pleco (L136)
Aquarium Filtration
Strong, oxygen-rich filtration is crucial. Use a canister filter or sponge filter with moderate flow. Weekly water changes of 25–30% are essential to maintain water quality.
Aquarium Plants
L136 does not harm plants. Use hardy species such as Anubias, Java Fern, or Amazon Swords, which thrive in low to moderate light and do not require substrate rooting.
Aquarium Lighting
Low lighting is preferred. Bright lights should be diffused or paired with ample hiding spaces such as driftwood and caves to prevent stress.
Aquarium Heating
Maintain stable water temperatures between 26°C – 29°C, replicating their natural warm, tropical habitat. Use a heater with accurate thermostat control.
Aquarium Substrate
Soft, sandy substrate is ideal to prevent damage to delicate ventral surfaces. Avoid sharp gravel that can cause injury.
Aquarium Decorations
Essential for this species. Provide plenty of driftwood, smooth stones, and pleco caves to create dark, secure hiding places. L136s are shy and rely heavily on cover for comfort and security.
