L-Number Plecos

Shop L-number Plecos and specialised freshwater catfish online at Aquaholics Online.

L-number Plecos are some of the most distinctive and sought-after freshwater catfish in the aquarium hobby. Known for their unusual patterns, colours and behaviours, these South American Loricariid catfish range from compact species suited to carefully planned community aquariums through to much larger Plecos requiring substantial tanks.

Our range changes regularly and may include L144 Blue Eye Lemon Bristlenose, L129 Plecos, L168 Clown Plecos, L397 Tiger Plecos and other L-number varieties depending on livestock availability.

What Are L-Number Plecos?

The L-number system was developed to identify Loricariid catfish entering the aquarium hobby before many had been formally described or easily distinguished by scientific name.

Each number identifies a particular type, population or recognised form of Pleco.

You'll commonly see names such as:

• L144
• L129
• L168
• L397

alongside the common or scientific name of the fish.

Because different L-number Plecos can have very different care requirements, the number alone should never be used to assume adult size, diet or temperament.

Choosing an L-Number Pleco

Before adding an L-number Pleco to your aquarium, consider:

• Expected adult size
• Minimum aquarium size
• Diet
• Water temperature
• pH and hardness
• Temperament
• Compatibility with other bottom-dwelling fish
• Need for caves or driftwood
• Filtration requirements
• Breeding behaviour

Some L-number Plecos remain relatively compact, while others can become much larger.

Always research the individual species before purchasing.

L144 Blue Eye Lemon Bristlenose

L144 Blue Eye Lemon Bristlenose are a popular Ancistrus-type Pleco known for their yellow to lemon colouration and distinctive blue or dark eyes.

Like other Bristlenose Catfish, they are generally much more manageable in size than large common Plecos and can work well in suitably sized freshwater community aquariums.

They appreciate:

• Caves and sheltered areas
• Driftwood
• Suitable sinking foods
• Vegetable-based foods
• Good filtration
• Stable water quality

Adults may become territorial around preferred caves, particularly during breeding.

L129 Plecos

L129 Plecos are attractive Hypancistrus-type catfish known for their contrasting markings and compact appearance.

Their care differs from algae-grazing Bristlenose, so they should be provided with a species-appropriate diet rather than being expected to survive on algae alone.

A well-structured aquarium containing caves, rockwork or driftwood can provide useful shelter and territories.

L168 Clown Plecos

L168 Plecos are popular for their distinctive striped or patterned appearance.

They appreciate structured aquariums with plenty of shelter and suitable feeding areas.

As with all specialist Plecos, check their adult size, diet and water requirements before adding them to an established aquarium.

L397 Tiger Plecos

L397 Tiger Plecos are sought after for their striking orange and dark striped pattern.

They make an impressive feature catfish in a suitably planned freshwater aquarium.

Providing hiding places, appropriate food and excellent water quality is important for maintaining specialised Plecos successfully.

Aquarium Size

There is no single aquarium size suitable for every L-number Pleco.

Some remain relatively small, while others grow substantially larger.

When choosing a tank, consider:

• Adult fish size
• Number of Plecos
• Available floor space
• Number of caves
• Tank mates
• Filtration capacity

Plecos spend much of their time around the lower levels of the aquarium, so floor space and available territories can be just as important as total water volume.

Aquarium Setup

Many L-number Plecos appreciate an aquarium with plenty of natural structure.

A suitable setup can include:

• Driftwood
• Pleco caves
• Rockwork
• Smooth substrate
• Shaded areas
• Strong filtration
• Good water circulation
• Open feeding areas

Providing several hiding places can be especially important when keeping more than one territorial bottom-dwelling fish.

Hardscape should always be positioned securely so digging or movement cannot cause rocks or wood to collapse.

Do Plecos Need Driftwood?

Driftwood can be a valuable addition to many Pleco aquariums.

It provides:

• Natural shelter
• Shaded areas
• Grazing surfaces
• Biofilm
• Territories
• A more natural aquarium environment

Some Pleco species interact with wood more heavily than others, so the individual species' requirements should always be checked.

Feeding L-Number Plecos

One of the biggest mistakes with Plecos is assuming they all live primarily on algae.

Diet varies considerably between species.

Suitable foods may include:

• Quality sinking catfish pellets
• Algae wafers
• Vegetable-based wafers
• Spirulina foods
• Protein-rich sinking foods
• Frozen foods
• Fresh vegetables where appropriate

Some L-number Plecos require significantly more protein than common algae-grazing Bristlenose.

Always select food according to the species being kept.

Do L-Number Plecos Eat Algae?

Some Plecos graze on algae and biofilm, but not all L-number Plecos are effective algae eaters.

Many specialised Plecos have dietary requirements that include greater amounts of protein, plant material or other foods.

They should never be purchased solely as aquarium cleaners.

Every Pleco requires a complete, species-appropriate diet.

Pleco Caves & Hiding Places

Caves are particularly useful for many L-number Plecos.

They provide:

• Secure daytime shelter
• Defined territories
• Reduced stress
• Potential breeding sites

When keeping several Plecos, provide multiple hiding places rather than expecting all fish to share the same cave.

Filtration & Water Quality

Plecos can produce a significant amount of waste relative to their size.

Reliable mechanical and biological filtration is therefore important.

A good maintenance routine should include:

• Regular partial water changes
• Substrate cleaning
• Filter maintenance
• Water testing
• Removal of uneaten food

Many specialised Plecos also appreciate well-oxygenated water and good circulation.

L-Number Pleco Tank Mates

Many smaller Plecos can coexist successfully with peaceful freshwater community fish.

Possible tank mates may include:

• Tetras
• Rainbowfish
• Gouramis
• Corydoras
• Peaceful Cichlids
• Other compatible catfish

Care is needed when keeping multiple Plecos because territorial behaviour can occur around caves, feeding areas and preferred hiding places.

Always consider adult size and temperament before mixing species.

L-Number Plecos & Corydoras

Plecos and Corydoras can often share an aquarium successfully because their behaviour and feeding styles differ.

However, both occupy the lower areas of the aquarium.

Make sure there is:

• Enough floor space
• Adequate food
• Multiple hiding areas
• Suitable substrate
• Good filtration

This helps reduce competition and ensures every fish receives appropriate food.

L-Number Plecos & Live Plants

Many L-number Plecos can be maintained in planted aquariums.

Live plants, driftwood and natural hardscape can create an attractive environment while providing shelter and grazing surfaces.

Large Plecos may accidentally disturb delicate plants, so plant choice and aquarium layout should take the adult size of the fish into account.

Breeding L-Number Plecos

Many commonly kept L-number Plecos are cave spawners.

In suitable conditions, a male may claim and defend a cave where eggs are laid.

Successful breeding depends on the particular species and may require:

• Suitable caves
• Mature compatible fish
• Appropriate water conditions
• Good nutrition
• Stable water quality

Some species breed relatively readily in aquariums, while others are significantly more specialised.

Buy L-Number Plecos Online in Australia

Aquaholics Online stocks a changing range of L-number Plecos and specialised freshwater catfish for Australian aquarium enthusiasts.

Because these are live fish, individual species, L numbers and sizes vary according to availability.

Browse the current range above to see which L-number Plecos are currently available.

Frequently Asked Questions

What does the L number mean on a Pleco?

An L number is an identification number used for Loricariid catfish in the aquarium hobby. It helps distinguish different Plecos, particularly species or forms that were not initially easily identified by scientific name.

Are L-number Plecos the same as Bristlenose Catfish?

Some L numbers refer to Ancistrus or Bristlenose-type catfish, but many belong to completely different Pleco genera. Their adult size, diet and care requirements can therefore vary considerably.

Do all L-number Plecos eat algae?

No. Some species graze on algae and biofilm, while others require diets containing considerably more protein or other specialised foods.

Do Plecos need driftwood?

Many Plecos benefit from driftwood as shelter and a grazing surface. How important wood is to the diet varies between species.

Do L-number Plecos need caves?

Many species appreciate caves for shelter and territory, and caves are particularly important for species that breed in enclosed spaces.

Can different L-number Plecos live together?

Sometimes. Compatibility depends on species, aquarium size, adult size and territorial behaviour. Provide plenty of floor space and multiple hiding places.

Can L-number Plecos live with Corydoras?

Yes, many can. Make sure the aquarium provides adequate floor space, appropriate food and suitable hiding areas for both groups.

What do L-number Plecos eat?

Diet varies by species and may include sinking pellets, algae or vegetable wafers, protein-rich foods, frozen foods and suitable fresh vegetables.

How big do L-number Plecos grow?

Adult size varies greatly. Some species remain compact while others grow into very large catfish, so always check the individual L number before purchasing.

Are L-number Plecos good community fish?

Many smaller species can work well in community aquariums, provided their water requirements and temperament are compatible with the other fish.

Do you ship L-number Plecos Australia-wide?

Aquaholics Online ships live fish to eligible Australian locations, subject to livestock availability, regional restrictions and biosecurity requirements.