L528 Pleco - Rio Paraguay Bristlenose Pleco (Ancistrus sp. "Rio Paraguay") – Tank-Bred
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Species Overview
The Rio Paraguay Bristlenose Pleco (L528 Pleco) (Ancistrus sp. "Rio Paraguay"), also known as the Redspot Pleco or Redspot Bristlenose Pleco, is one of the most exciting Bristlenose Plecos available in the aquarium hobby today. This stunning species combines the manageable size and algae-grazing abilities of a traditional Bristlenose Pleco with a truly unique pattern featuring cream, black, and reddish-orange spotting.
Unlike many plecos that eventually outgrow community aquariums, the Rio Paraguay Bristlenose remains compact while still developing impressive coloration and patterning. Every fish displays its own unique markings, making each specimen a living work of art. As they mature, many individuals develop increasingly dramatic contrast and spotting, making them highly desirable among pleco collectors.
Our Tank-Bred and Locally Bred Rio Paraguay Bristlenose Plecos are aquarium-raised and exceptionally well adapted to life in captivity. Locally Bred specimens are offered at a larger purchase size, making them an excellent choice for hobbyists seeking more developed fish with emerging adult coloration and body structure. Whether you're looking for a hardworking algae grazer, a standout community fish, or a collector-worthy pleco, the Redspot Pleco checks every box.
What We Love About This Fish
• Stunning black, cream, and red-spotted patterning unlike any common Bristlenose
• Excellent algae grazer for planted and community aquariums
• Manageable 4–5 inch adult size compared to Common Plecos
• Tank-Bred and Locally Bred for aquarium success
• A collector-worthy Bristlenose that remains beginner friendly
Quick Care Guide
• Care Level: Easy to Moderate
• Temperament: Peaceful
• Diet: Omnivore
• Source: Tank-Bred | Locally Bred
• Adult Size: Approximately 4–5 Inches (10–13 cm)
• Average Purchase Size:
- Tank-Bred: Approximately 1.5–2 Inches (3.8–5 cm)
- Locally Bred: Approximately 2–2.35 Inches (5–6 cm)
• Lifespan: 5–10+ Years
• Activity Level: Moderate
• Social Behavior: Peaceful Bottom Dweller
• Swimming Zone: Bottom
Tank Parameters
• Temperature: 72–82°F (22–28°C)
• pH: 6.2–7.8
• GH: 3–15 dGH
• Minimum Aquarium Size: 20 Gallons
• Water Flow: Moderate
• Oxygenation: Moderate to High
Natural Habitat
The Rio Paraguay Bristlenose Pleco originates from tributaries and waterways associated with the Paraguay River Basin in South America. These environments typically contain submerged wood, leaf litter, root systems, and rocky structures that provide shelter and feeding opportunities.
Like many Bristlenose Plecos, this species spends much of its time grazing on biofilm, algae, microorganisms, and organic material found on submerged surfaces. Their flattened body shape and sucker mouth are perfectly adapted for navigating these environments.
Seasonal flooding often creates complex habitats filled with driftwood, branches, and submerged vegetation. These natural structures play an important role in the daily lives of plecos and should be considered when designing an aquarium for this species.
Aquascaping
Rio Paraguay Bristlenose Plecos thrive in aquariums that provide abundant driftwood, caves, rockwork, and shaded retreat areas. While they are often visible during the day, they appreciate secure hiding places where they can rest and retreat when desired.
Driftwood is particularly beneficial, providing natural grazing surfaces while helping create a more authentic South American environment. Pleco caves, rock formations, and root structures further increase habitat complexity and encourage natural behavior.
Excellent plant choices include Anubias, Java Fern, Bucephalandra, Amazon Sword Plants, Cryptocoryne species, and Vallisneria. These sturdy plants typically coexist well with Bristlenose Plecos.
An ideal aquarium combines driftwood, plants, caves, and open areas while maintaining good water movement and oxygenation.
Diet and Feeding
The Rio Paraguay Bristlenose Pleco is an omnivore that benefits from a varied diet. While it will graze on algae and biofilm throughout the aquarium, algae alone should not be considered a complete diet.
High-quality algae wafers, sinking pellets, pleco foods, and quality community fish foods should form the foundation of their feeding program. Many hobbyists are surprised to learn that Bristlenose Plecos readily consume fish flakes, especially when they sink into the lower portions of the aquarium.
Fresh vegetables such as zucchini, cucumber, spinach, green beans, squash, and shelled peas are excellent supplemental foods. These foods help provide dietary variety while supporting digestion and long-term health.
Protein-rich foods such as bloodworms, blackworms, brine shrimp, and insect-based foods can be offered occasionally, particularly for growing fish and breeding adults. A varied diet often results in improved coloration, stronger growth, and better overall condition.
Tank Mates and Compatibility
Rio Paraguay Bristlenose Plecos are peaceful community fish that work well with a wide variety of freshwater species. Their calm nature and bottom-dwelling lifestyle allow them to coexist with many popular aquarium fish.
Excellent tank mates include:
• Angelfish (Pterophyllum scalare) – South American Community Cichlid
• German Blue Ram (Mikrogeophagus ramirezi) – Peaceful Dwarf Cichlid
• Cardinal Tetra (Paracheirodon axelrodi) – Schooling Community Fish
• Rummy Nose Tetra (Hemigrammus rhodostomus) – Active Schooling Fish
• Corydoras Catfish (Corydoras spp.) – Social Bottom Dweller
• Hatchetfish (Carnegiella spp.) – Surface Dwelling Community Fish
• Honey Gourami (Trichogaster chuna) – Peaceful Community Fish
• Rainbowfish Species – Active Midwater Community Fish
Multiple Rio Paraguay Bristlenose Plecos can often be maintained together when adequate caves and territories are provided.
Shrimp Safe
Rio Paraguay Bristlenose Plecos are generally considered shrimp safe.
Healthy adult shrimp and juvenile shrimp are rarely bothered by this species. Newly hatched shrimplets may occasionally be consumed, particularly if encountered while grazing.
Shrimp Compatibility Rating
Adult Shrimp: Excellent Compatibility
Juvenile Shrimp: Excellent Compatibility
Shrimplets: Moderate Predation Risk
Breeding
Like other Bristlenose Plecos, the Rio Paraguay Bristlenose Pleco is a cave-spawning species. Mature males establish territories and guard eggs after spawning.
Males develop facial bristles that become increasingly pronounced with age and maturity. Females typically possess smaller or fewer bristles.
Given proper water quality, caves, and nutrition, captive breeding is achievable for experienced hobbyists.
Breeding Difficulty
Moderate
Reproduction Type
Cave Spawner
Frequently Asked Questions
What is a Rio Paraguay Bristlenose Pleco?
The Rio Paraguay Bristlenose Pleco (L528) is a unique Bristlenose Pleco known for its beautiful cream, black, and red-spotted patterning.
Is this the same fish as a Redspot Pleco?
Yes. The Rio Paraguay Bristlenose Pleco is commonly referred to as the Redspot Pleco or Redspot Bristlenose Pleco.
Is the Rio Paraguay Bristlenose a good algae eater?
Yes. It is an excellent algae grazer and a valuable member of many aquarium cleanup crews.
Does it stay smaller than a Common Pleco?
Absolutely. Adults typically reach only 4–5 inches, making them dramatically smaller than Common Plecos.
Is this fish beginner friendly?
Yes. It is one of the more beginner-friendly specialty plecos available.
What makes the Rio Paraguay Bristlenose different from a Common Bristlenose?
Its distinctive patterning and coloration make it considerably more unique and collectible.
What makes it different from a Super Red Bristlenose?
Super Reds display solid red coloration, while Rio Paraguay Bristlenose Plecos develop spotted and patterned markings.
What makes it different from a Blue Eye Lemon Bristlenose?
Blue Eye Lemons display bright yellow coloration, while Rio Paraguay Plecos exhibit intricate spotted patterns.
Is this pleco safe with plants?
Yes. It is generally considered plant safe.
Can it live in planted aquariums?
Absolutely.
Can it live with shrimp?
Yes. Adult shrimp are generally very safe with this species.
Does it need driftwood?
Highly recommended.
Does it need caves?
Yes. Caves provide security and breeding sites.
Will males develop bristles?
Yes. Mature males develop prominent facial bristles.
Can it live with Angelfish?
Yes.
Can it live with Discus?
Yes.
Can it live with Corydoras?
Yes.
Can I keep more than one?
Yes, provided sufficient caves and territories are available.
How much algae will it eat?
It consumes algae regularly but should not be expected to eliminate all algae in an aquarium.
What vegetables can I feed?
Zucchini, cucumber, squash, spinach, green beans, and peas are all excellent choices.
Will it eat fish flakes?
Yes. Sinking flakes are often readily accepted.
How large does it get?
Approximately 4–5 inches.
Is it nocturnal?
Mostly crepuscular and nocturnal but often visible during the day.
What pH is best?
6.2–7.8.
What temperature is best?
72–82°F.
How long does it live?
Typically 5–10 years or longer.
What is the difference between Tank-Bred and Locally Bred?
Locally Bred fish are generally offered at a larger purchase size.
Which variant is larger?
Locally Bred specimens.
Why choose a Locally Bred specimen?
They typically arrive at a larger size with more developed coloration and patterning.
Will this pleco breed in aquariums?
Yes, under suitable conditions.
Why is the L528 becoming more popular?
Its combination of manageable size, algae-eating ability, and unique patterning make it highly desirable among hobbyists.
For the safety of our animals, we only ship live fish, crabs, and select other inverts exclusively via UPS 1 Day Air. If your order contains this item, you will only see UPS 1 Day Air as a shipping option during checkout. If other items are in your cart that can ship with 2 day or standard shipping options the only shipping method you can still select is UPS 1 Day Air.
UPS 1 Day is a description of the duration of time a shipment will spend in transit once it has been shipped. This does not guarantee the package will be shipped the same or next day from which the order was placed.
Shipping Schedule for this service
Current Handling Time:
1-9 business days
Here at Aquatic Arts, we consider the welfare of the live animals we are shipping to be of the foremost importance. This process is much more involved than simply creating a shipping label and affixing it to a box. Depending on the order, it takes from 4 to 7 people to complete this process properly. We check the weather conditions here where they fly out of the Indianapolis UPS facility and the destination for each shipment. We start early each morning and go through a multi-step process to have the day's shipments prepared in time for the UPS pickup. The volume of orders in our system also affects the processing time. Therefore our stated handling time is 1-9 business days.
Shipping Rate
Pricing is by size of package needed to fill entire order and distance it must travel. It will be calculated at checkout.
Live Arrival Guarantee
We stand behind the health and quality of every fish we ship. Each Rio Paraguay Bristlenose Pleco (L528 Pleco) is carefully quarantined, observed, and conditioned before leaving our facility to help ensure it arrives healthy and ready to thrive in its new home.
Every order is backed by our 100% Live Arrival Guarantee. If an issue occurs during transit, please email photos of the animal and packaging within the timeframe outlined in our policy to info@aquaticarts.com so our team can assist you.
For complete guarantee details, reporting requirements, and claim deadlines, please review our Live Arrival Guarantee Policy:
https://aquaticarts.com/policies/refund-policy
In addition to our Live Arrival Guarantee, every purchase includes access to our experienced support team. Whether you have questions about acclimation, aquarium setup, compatibility, feeding, breeding, or long-term care, we are here to help you succeed.
Best Fishes,
The Aquatic Arts Team
