Red Glass Barb (Pethia conchonius) – Tank-Bred

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Species Overview

The Red Glass Barb (Pethia conchonius) is a colorful, active freshwater barb prized for its translucent appearance and warm red to rosy coloration. Closely associated with the familiar Rosy Barb, this selectively bred aquarium form combines the energetic schooling behavior that makes barbs so enjoyable to watch with a distinctive lighter-bodied appearance that allows flashes of red, silver, and iridescence to stand out as the fish move through the aquarium. Mature males generally develop the strongest coloration, particularly when comfortable and displaying among other members of their group.

Red Glass Barbs are social fish and should be maintained in a proper group rather than as solitary specimens. When given sufficient swimming room, plant cover, and the company of their own kind, the group creates constant movement throughout the middle levels of the aquarium. Their adaptability, enthusiastic feeding response, and compatibility with many appropriately chosen community fish make them an excellent option for aquarists looking for an active schooling species rather than a single centerpiece fish.

Aquatic Arts offers Tank-Bred and USA-Bred Red Glass Barbs, depending on the selection purchased. Captive-bred Red Glass Barbs are accustomed to aquarium conditions and prepared foods, making them an excellent choice for established freshwater community aquariums.

What We Love About This Fish

  • Beautiful red glass coloration combines warm red tones with a lighter, partially translucent body that becomes especially striking as a group moves through a planted aquarium.
  • True social behavior makes a properly sized group considerably more interesting to watch than a single fish, with schooling, displaying, and constant interaction between individuals.
  • Tank-Bred and USA-Bred selections give customers the opportunity to choose captive-bred fish based on their preferred source.
  • Active without requiring an enormous aquarium, making Red Glass Barbs an excellent way to add movement and color to a thoughtfully planned community setup.
  • Hardy and adaptable aquarium fish that readily accept a varied diet and can be an approachable choice for aquarists ready to maintain an appropriate social group.

Quick Care Guide

Scientific Name: Pethia conchonius

Common Name: Red Glass Barb

Source: Tank-Bred or USA Bred (Varies by Selection)

Average Purchase Size: Approximately 1–1.5 Inches (2.5–3.8 cm)

Average Adult Size: Approximately 4–6 Inches (10–15 cm), so considerably more swimming space is needed as these active barbs mature.

Care Level: Easy to Moderate. Red Glass Barbs are hardy and adaptable but require clean water, open swimming space, and a proper social group.

Temperament: Peaceful to Semi-Peaceful. They generally make excellent community fish but may occasionally nip slow-moving or long-finned tank mates.

Diet: Omnivore. A varied diet of quality prepared, frozen, live, and plant-based foods supports healthy growth and strong coloration.

Schooling: Yes. Red Glass Barbs should be kept in a group so they can display natural social behavior and distribute chasing among the school.

Activity Level: Active. These energetic barbs need plenty of open horizontal swimming space.

Aquarium Level: Midwater. Red Glass Barbs spend most of their time actively swimming through the middle of the aquarium.

Minimum Aquarium Size: 30 Gallons. Their adult size, activity level, and schooling behavior require more room than their juvenile purchase size suggests.

Lifespan: Approximately 5–7 Years with proper care.

Aquatic Arts Tip

Plan the aquarium around the adult school, not the size of the juveniles you receive. Give Red Glass Barbs plenty of open swimming room surrounded by planted areas where the group can retreat and feel secure.

Recommended Water Parameters & Aquarium Requirements

Red Glass Barbs are adaptable fish, but they thrive when given stable water conditions, good filtration, and plenty of swimming room for their active school.

Water Parameters

Temperature: 64–75°F (18–24°C). Red Glass Barbs prefer cooler conditions than many tropical community fish.

pH: 6.5–7.5. Red Glass Barbs thrive in slightly acidic to slightly alkaline water, with stability being more important than targeting an exact number.

General Hardness (GH): 4–18 dGH. Soft to moderately hard water is generally well tolerated.

Carbonate Hardness (KH): 2–12 dKH. Stable buffering helps prevent sudden changes in pH.

Ammonia: 0 ppm

Nitrite: 0 ppm

Nitrate: Below 20 ppm preferred.

Aquarium Requirements

Minimum Aquarium Size: 30 Gallons. Their adult size and active schooling behavior require plenty of horizontal swimming room.

Filtration: Moderate to Strong. Good filtration helps maintain the clean, oxygen-rich water these active fish prefer.

Water Flow: Moderate. Red Glass Barbs appreciate water movement but should also have calmer areas for resting.

Oxygenation: Moderate to High. Good surface agitation supports the active metabolism of the school.

Aquarium Maturity: Fully cycled and established. Stable biological filtration reduces the risk of sudden water-quality problems.

Aquatic Plants: Recommended. Planting around the sides and back provides security while preserving an open central swimming area.

Lighting: Low to Moderate. Moderate lighting works well, especially when balanced with live plants and shaded areas.

Aquatic Arts Tip

Give Red Glass Barbs a combination of open swimming space and planted cover rather than filling the entire aquarium with décor. This gives the school room to move while still providing secure areas where fish can retreat when needed.

 

Origin & Natural Habitat

Origin: South Asia, primarily India, with the natural range of Pethia conchonius extending into surrounding regions.

Wild Red Glass Barb ancestors inhabit rivers, streams, ponds, and other freshwater environments ranging from gently flowing waterways to quieter vegetated areas. These habitats often include open swimming areas bordered by aquatic vegetation, submerged roots, rocks, and other natural structure.

Seasonal rainfall can significantly change these environments, expanding waterways and increasing access to food and spawning habitat. Their naturally variable habitat helps explain why Pethia conchonius is adaptable to a relatively broad range of aquarium conditions.

Although understanding the natural habitat helps guide their aquarium care, the Red Glass Barbs offered by Aquatic Arts are captive-bred, not wild collected. Depending on the selection purchased, your fish will be either Tank-Bred or USA Bred and already accustomed to life in an aquarium.

Red Glass Barbs look their best in a planted aquarium that combines open swimming space with dense areas of vegetation. Keep the center and front relatively open for schooling while using plants, wood, and stone around the edges to create shelter and break up sight lines.

  • Live Plants: Vallisneria, Cryptocoryne, Java Fern, Anubias, Water Wisteria, and Amazon Swords provide natural cover without sacrificing swimming room.
  • Floating Plants: Amazon Frogbit, Salvinia, and Red Root Floaters create shaded areas that help the school feel secure while leaving open surface space.
  • Driftwood: Spider Wood and Malaysian Driftwood create natural structure and visual barriers without crowding the aquarium.
  • Rockwork: Smooth river stones and rounded gravel complement the stream-inspired aquascape while leaving plenty of open space for swimming.
  • Botanicals: Indian Almond Leaves, Magnolia Leaves, and Mixed Fruit Leaf Packs can be used lightly to create natural detail without covering the open substrate.
  • Substrate: Sand or fine gravel works well and provides a natural foundation for planted areas around the aquarium perimeter.

Aquatic Arts Tip

Think open river channel surrounded by vegetation when designing the aquarium. Red Glass Barbs need room for the school to move together, so concentrate plants and hardscape around the sides and back while preserving a broad swimming area through the center.

Red Glass Barbs are omnivores that naturally feed on small insects, aquatic invertebrates, algae, plant matter, and other available foods. In the aquarium, a varied diet helps maintain strong coloration, healthy growth, and the energy needed for their active schooling behavior.

  • Staple Diet: High-quality flakes or appropriately sized pellets provide balanced daily nutrition.
  • Frozen Foods: Bloodworms, Brine Shrimp, Daphnia, and Mysis Shrimp provide protein and dietary variety.
  • Live Foods: Live Daphnia, Moina, Baby Brine Shrimp, and Blackworms encourage natural feeding behavior and are excellent for conditioning breeding fish.
  • Plant-Based Foods: Spirulina flakes and other vegetable-rich foods provide important plant matter and help balance their omnivorous diet.
  • Feeding Schedule: Feed one to two small meals daily, offering only what the fish can consume within a few minutes.

Aquatic Arts Tip

Don't feed Red Glass Barbs a protein-only diet. Rotating quality prepared foods with live or frozen foods and plant-based foods provides better nutritional balance while supporting coloration, activity, and breeding condition.

Red Glass Barbs are active, social fish that work well in many peaceful community aquariums. The best tank mates are similarly active species that tolerate their cooler temperature range and are not easily intimidated by a busy school of barbs.

Excellent Tank Mates

  • Danios: Zebra Danios (Danio rerio) and Pearl Danios (Danio albolineatus) are active swimmers that pair well with the energy level of Red Glass Barbs.
  • Rasboras: Harlequin Rasboras (Trigonostigma heteromorpha) and other appropriately sized peaceful rasboras can make excellent midwater companions.
  • Corydoras: Peppered Corydoras (Corydoras paleatus) and other temperature-compatible Corydoras add peaceful activity along the bottom of the aquarium.
  • Loaches: Kuhli Loaches (Pangio kuhlii) and other peaceful, appropriately sized loaches generally occupy different areas of the aquarium and avoid direct competition.
  • Other Peaceful Barbs: Cherry Barbs (Puntius titteya) and similarly peaceful barbs can work well when each species is maintained in a proper group.

Tank Mates to Avoid

Avoid very slow-moving, timid, or long-finned fish that may be stressed or occasionally fin-nipped by an active school. Large predatory fish and highly aggressive cichlids are also poor companions.

Aquatic Arts Tip

A properly sized school is part of compatibility. Red Glass Barbs kept with enough of their own kind are more likely to direct their social chasing and displaying toward one another rather than other community fish. Choose similarly active tank mates and give everyone enough swimming room.

Shrimp Safe: With Caution

Red Glass Barbs are omnivorous and opportunistic feeders, so they should not be considered completely shrimp safe. Healthy adult shrimp may coexist with a well-fed school, but small shrimp and shrimplets can easily be viewed as food.

Adult Amano Shrimp, Bamboo Shrimp, and Vampire Shrimp are generally better choices because their larger size makes them less vulnerable. Adult Neocaridina and Caridina Shrimp may also coexist in heavily planted aquariums, but juvenile shrimp should be expected to experience some predation.

Peaceful freshwater snails such as Nerite Snails, Mystery Snails, and Ramshorn Snails are generally compatible because Red Glass Barbs are unlikely to bother healthy adult snails.

Aquatic Arts Tip

If maintaining shrimp with Red Glass Barbs, provide dense Java Moss, Subwassertang, Cholla Wood, plants, and botanicals where shrimp can retreat. If your primary goal is maximizing shrimplet survival and building a large breeding colony, a fish-free shrimp aquarium remains the better choice.

Breeding Difficulty: Easy to Moderate

Reproduction: Egg Scatterer

Red Glass Barbs are egg-scattering fish that can breed readily when mature adults are well conditioned. Males typically develop stronger coloration and actively court females before spawning among plants or other fine-leaved material.

Breeding aquariums should provide Java Moss, spawning mops, or other fine-leaved plants where eggs can fall away from the adults. Red Glass Barbs provide no parental care and may eat their own eggs, so breeders commonly remove the adults after spawning or use a setup that protects the eggs.

Once free-swimming, fry can be started on infusoria, microworms, or other appropriately sized foods before progressing to newly hatched Baby Brine Shrimp and finely crushed prepared foods as they grow.

Aquatic Arts Tip

Condition breeding adults with a varied diet that includes live and frozen foods before spawning. A spawning mop, dense Java Moss, or a protected egg-scattering area can significantly improve egg and fry survival by keeping them away from hungry adults.

How large do Red Glass Barbs get?

Red Glass Barbs typically reach approximately 4–6 inches (10–15 cm) as adults. Their adult size and active swimming behavior should be considered when choosing an aquarium.

Are Red Glass Barbs schooling fish?

Yes. Red Glass Barbs are social schooling fish and should be kept with several of their own kind. A proper group encourages natural social behavior and helps distribute chasing among the school.

What size aquarium do Red Glass Barbs need?

A 30-gallon aquarium or larger is recommended for Red Glass Barbs. Larger aquariums provide more horizontal swimming space for a school and make it easier to maintain them in a community setting.

Are Red Glass Barbs good community fish?

Yes. Red Glass Barbs can make excellent community fish when kept with similarly active, peaceful species. Very timid, slow-moving, or long-finned fish are less suitable companions.

Are Red Glass Barbs aggressive?

Red Glass Barbs are generally peaceful to semi-peaceful. Some chasing and displaying is normal within the school, and occasional fin nipping can occur, particularly when the group is too small.

Do Red Glass Barbs nip fins?

They can. Red Glass Barbs are active barbs and may occasionally nip long fins, making slow-moving fish with elaborate finnage less suitable tank mates.

What do Red Glass Barbs eat?

Red Glass Barbs are omnivores that thrive on quality flakes or pellets supplemented with frozen foods, live foods, and plant-based foods such as spirulina.

Can Red Glass Barbs live with shrimp?

Adult shrimp may coexist with Red Glass Barbs, but small shrimp and shrimplets may be eaten. Larger Amano, Bamboo, and Vampire Shrimp are generally better choices than maintaining a breeding colony of small ornamental shrimp.

Can Red Glass Barbs live with snails?

Yes. Healthy adult Nerite Snails, Mystery Snails, Ramshorn Snails, and other peaceful freshwater snails generally coexist well with Red Glass Barbs.

Can Red Glass Barbs live with Corydoras?

Yes. Temperature-compatible Corydoras can make excellent tank mates because they are peaceful and primarily occupy the bottom of the aquarium.

Can Red Glass Barbs live with Bettas?

Red Glass Barbs are generally not recommended with Bettas. Their active swimming and potential for fin nipping can stress Bettas, particularly long-finned varieties.

Can Red Glass Barbs live with Angelfish?

They are generally not an ideal combination. Red Glass Barbs may nip the long fins of Angelfish, and their preferred temperature ranges do not overlap as well as those of many other community fish.

Do Red Glass Barbs need a heater?

Not always. Red Glass Barbs tolerate cooler water than many tropical fish. Whether a heater is necessary depends on the room temperature and the ability to maintain a stable aquarium temperature within their recommended range.

Are Red Glass Barbs good for beginners?

Yes. Red Glass Barbs can be a good choice for newer aquarists who can provide an appropriately sized, fully cycled aquarium and maintain them as a proper social group.

How can I tell male and female Red Glass Barbs apart?

Mature males generally develop stronger red or rosy coloration, while females tend to have fuller bodies and more subdued coloration. Sex differences become easier to recognize as the fish mature.

Are Red Glass Barbs easy to breed?

Yes. Red Glass Barbs can breed readily when mature adults are well conditioned. They scatter eggs among plants or spawning material and provide no parental care.

Will Red Glass Barbs eat their eggs?

Yes. Adult Red Glass Barbs may eat both eggs and newly hatched fry. Breeders commonly separate the adults after spawning or use Java Moss, spawning mops, or other structures that protect the eggs.

Are Red Glass Barbs the same as Rosy Barbs?

Red Glass Barbs are an aquarium form of Pethia conchonius, the species commonly known as the Rosy Barb. The Red Glass name describes the particular appearance or strain rather than a separate species.

Is Puntius conchonius the same fish as Pethia conchonius?

Yes. Puntius conchonius is an older scientific name that is still commonly encountered in aquarium literature and product searches. The species is currently classified as Pethia conchonius.

Are the Red Glass Barbs from Aquatic Arts wild collected?

No. The Red Glass Barbs offered by Aquatic Arts are captive-bred. Depending on the selection purchased, they are offered as either Tank-Bred or USA Bred.

Would Aquatic Arts recommend Red Glass Barbs for my aquarium?

Yes, when the aquarium has enough room for an active school and compatible tank mates. Red Glass Barbs are colorful, hardy, social fish that can bring constant movement to a planted community aquarium.

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

UPS 1 Day: Monday through Thursday
 

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.

 

 

We stand behind the health and quality of every fish we offer. Each Red Glass Barb is carefully quarantined, observed, and conditioned before shipment to help ensure it arrives healthy and ready for its new aquarium.

Every Red Glass Barb is backed by our 100% Live Arrival Guarantee, and every fish order ships in the Aquatic Arts Live Arrival Guarantee Box at no additional charge. Weather-appropriate insulation and heating or cooling materials are used when needed to help protect your fish during transit.

Red Glass Barbs are hardy fish, but shipping and sudden changes in temperature or water chemistry can still cause stress. Have a fully cycled aquarium ready before arrival and follow our acclimation instructions carefully. Stable water conditions and an established aquarium give your new fish the best opportunity to settle in successfully.

If your Red Glass Barb arrives with an issue, please follow the claim instructions included with your order or submit the required information through our DOA Claim Form. Our Customer Support Team will review the claim and assist with the appropriate resolution.

DOA Claim Form: https://aquaticarts.com/pages/doa-claim

Questions: info@aquaticarts.com

Complete Live Arrival Guarantee: https://aquaticarts.com/pages/live-arrival-guarantee

Best Fishes,

The Aquatic Arts Team

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