A stunning, large-growing pleco famous for its red eyes, grey/green coloration, and dark horizontal stripes. Belonging to the genus Panaque, they are xylophagous (obligate wood-eaters); real driftwood in the aquarium is absolutely essential for their digestion and survival. They produce extreme amounts of sawdust-like waste and require heavy, high-flow filtration.
Royal Pleco (L190) At a Glance
Royal Pleco (L190) Tank Requirements
Will Royal Pleco (L190) fit in your tank?
Care guides tell you what Royal Pleco (L190) needs, the next question is whether your tank can safely provide it. Test Royal Pleco (L190) against your tank size, maintenance needs, and the fish you already keep before you buy.
Useful setup supplies
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Royal Pleco (L190) Water Parameters
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Royal Pleco (L190) Temperament & Compatibility
Royal Pleco (L190) Varieties
Each variety inherits the species defaults above. Only differences are highlighted.
Standard (Adult)
The fully grown adult form. Requires a massive aquarium, extremely heavy filtration to handle wood waste, and a large established territory.
Differs in 1 trait from base species
Also known as: Adult Royal Pleco, Full Grown
Juvenile (Grow-out)
Small juveniles commonly sold in stores. While they start small and can temporarily be kept in smaller aquariums, they will eventually require a massive tank. They must have access to driftwood immediately.
Differs in 6 traits from base species
Also known as: Baby Royal Pleco, Small L190
Royal Pleco (L190) Care Guide Summary
The Royal Pleco (L190), scientifically known as Panaque nigrolineatus, belongs to the Catfish family group. Adults reach a maximum size of approximately 43 cm and have a depressed body shape with a slow growth rate. Classified as semi-aggressive, this species primarily occupies the bottom zone of the aquarium and produces a extreme level of biological waste.
To thrive, the Royal Pleco (L190) requires a freshwater only aquarium with a minimum volume of 450 litres and a tank length of at least 150 cm. Water temperature should be maintained between 22°C and 28°C, with a pH range of 6.5–7.5 and a general hardness of 5–15 dGH. A high water flow is preferred.
The Royal Pleco (L190) is a rewarding species to keep, provided its core environmental needs are met. This species is available in 2 varieties: Standard (Adult) and Juvenile (Grow-out). Each may differ slightly in size, temperament, or care needs, so it is worth checking the specific requirements of the variety you plan to keep.
Royal Pleco (L190) Habitat Setup
When setting up an aquarium for the Royal Pleco (L190), a high water flow best suits their natural preferences. Because this species occupies the bottom zone, the aquarium layout should prioritise sufficient floor space with hiding spots among rocks, wood, or dense planting. Useful additions include driftwood, which can serve as both a hiding place and a dietary supplement. Keepers should note that live planted layouts may be difficult to maintain, as this species tends to uproot or consume vegetation.
Royal Pleco (L190) Compatibility Notes
Classified as semi-aggressive, the Royal Pleco (L190) is best housed alone, as they do not tolerate others of their kind in confined spaces. When choosing tankmates, conspecific aggression can be intense, especially in smaller tanks and territorial behaviour may cause issues if hiding spots or floor space are limited. Selecting tankmates that favour different water layers from the bottom zone can help reduce competition and territorial overlap.
Royal Pleco (L190) Recommended Tank Sizes
Standard aquarium sizes that meet the minimum volume and length requirements for Royal Pleco (L190).
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Frequently Asked Questions About Royal Pleco (L190)
How big does Royal Pleco (L190) get?
Royal Pleco (L190) (Panaque nigrolineatus) typically reaches a maximum adult size of approximately 43 cm. They have a depressed body shape and a slow growth rate.
What tank size does Royal Pleco (L190) need?
A minimum aquarium volume of 450 litres and a tank length of at least 150 cm are recommended for Royal Pleco (L190). This ensures enough swimming space and helps maintain stable water conditions.
What water parameters does Royal Pleco (L190) need?
Royal Pleco (L190) thrives in freshwater only conditions with a temperature range of 22–28°C, a pH between 6.5 and 7.5, and a general hardness of 5–15 dGH. A high water flow is preferred.
Is Royal Pleco (L190) peaceful or aggressive?
Royal Pleco (L190) is classified as semi-aggressive with an aggression score of 5 out of 10. They can work in community setups but may clash with certain tankmates.
Can Royal Pleco (L190) live with others of its kind?
No. Only one Royal Pleco (L190) should be kept per tank. Keeping multiples in the same aquarium typically results in aggression and stress.
Does Royal Pleco (L190) have any special tank requirements?
Yes. Royal Pleco (L190) benefits from driftwood (digestion/hiding) in the aquarium. These features help replicate their natural habitat and promote overall health and well-being.
Plants That Suit Royal Pleco (L190)
These plants pair well with Royal Pleco (L190) based on shared water preferences, layout fit, and how likely they are to hold up in the same aquarium.
African Water Fern
Bolbitis heudelotii
Boivin's Aponogeton
Aponogeton boivinianus
Capuron's Aponogeton
Aponogeton capuronii
African Onion Plant
Crinum calamistratum
Afzel's Anubias
Anubias afzelii
Anubias Barteri
Anubias barteri
Fish Similar to Royal Pleco (L190)
Clown Pleco (L104)
Panaqolus maccus
A popular, distinctly striped dwarf pleco native to Venezuela. It is a strictly wood-eating species (xylivore); real driftwood is mandatory for its survival and digestion. Because of this diet, it produces massive amounts of sawdust-like waste, requiring excellent mechanical filtration despite its small size. They are shy and predominantly nocturnal.
Common Pleco
Hypostomus plecostomus
A heavily armored, nocturnal catfish famous for eating algae. However, they grow incredibly large, produce massive amounts of waste, and frequently outgrow standard aquariums. They require driftwood in their diet for digestion. As they age, they may become territorial or develop a taste for the slime coat of slow-moving, flat-bodied tank mates.
Gold Nugget Pleco (L018)
Baryancistrus xanthellus
A stunning, highly sought-after Loricariid native to the fast-flowing, highly oxygenated waters of the Rio Xingu in Brazil. They feature a dark body covered in bright yellow spots with thick yellow seams on their dorsal and caudal fins. They require high temperatures, high water flow, and a diet rich in biofilm, aufwuchs, and fresh vegetables. They are notoriously territorial towards other bottom-dwellers.
Bristlenose Pleco
Ancistrus cf. cirrhosus
A highly popular, hardy, and relatively small suckermouth catfish. Excellent algae eaters that stay much smaller than Common Plecos, making them suitable for standard aquariums. They require dietary wood (driftwood) to aid in digestion and plenty of hiding caves.
Zebra Pleco (L046)
Hypancistrus zebra
A highly sought-after, strikingly beautiful black-and-white striped pleco endemic to the fast-flowing Xingu River in Brazil. Unlike common plecostomus, it is primarily carnivorous (a micropredator) and will not clean algae. They are notoriously shy, slow-growing, and require highly oxygenated, warm water with vigorous flow to thrive.
Bahia Red
Geophagus sp. Bahia Red
The Bahia Red is a beautiful, earth-eating cichlid belonging to the Geophagus brasiliensis complex. They are highly sought after for their vivid red/orange hues and pearlescent spangling. Like all 'eartheaters', they require a fine sand substrate to exhibit their natural sifting behaviors. While generally peaceful for a cichlid, they become aggressively territorial during breeding.