Rosy Barb Diamond (Pethia conchonius) — 2-2,5cm

Overview

The Rosy Barb (Pethia conchonius), particularly the striking gold variant, is a hardy, active, and peaceful schooling fish for aquarium setups. Originating from the rivers and streams of South Asia, this adaptable cyprinid thrives in cooler to tropical temperatures and brings lively color and movement to community tanks. Widely available for sale UK, the gold rosy barb is an excellent choice for beginner and experienced aquarists alike, offering ease of care, vibrant coloration, and engaging group behavior. Buy tropical fish UK from Tropical Fish Co and enjoy fast delivery, expert advice, and healthy, well-conditioned stock ready to thrive in your aquarium.

Appearance

The gold rosy barb displays a beautiful golden-yellow to orange body with a subtle metallic sheen. Males develop deeper, more intense coloration, especially during breeding season, with vibrant orange-red hues on the body and fins. Females are slightly larger but paler, with a more subdued golden-yellow coloration. The dorsal, anal, and caudal fins are often tipped with black, creating an attractive contrast. Adults typically reach 6.5 cm, with females slightly larger than males. Juveniles are paler and less vibrant but develop full coloration as they mature and establish social hierarchies within the school. When kept in groups, dominant males display their brightest colors and most active behavior.

Natural Habitat

Pethia conchonius is native to the rivers, streams, and ponds of South Asia, particularly northern India, Bangladesh, and Nepal. They inhabit slow to moderate-flowing waters with sandy or muddy substrates, dense vegetation, and ample cover from overhanging plants and submerged roots. Water chemistry is typically neutral to slightly alkaline, with moderate hardness. Rosy barbs are adaptable and tolerate a range of temperatures, including cooler subtropical conditions. In the wild, they form loose schools and feed on insects, zooplankton, plant matter, and organic detritus.

Aquarium Setup

A minimum tank size of 100 litres is recommended for a school of 6-10 rosy barbs, with larger setups (150+ litres) ideal for mixed community tanks. Provide open swimming space along with planted areas, driftwood, and smooth rocks for shelter and visual interest. Use a sandy or fine gravel substrate and ensure moderate water flow via a quality filter. These barbs are active swimmers and appreciate plenty of horizontal swimming space. Planting should be robust—use hardy species like Java Fern, Anubias, or Vallisneria, as rosy barbs may nibble on soft-leaved plants. Lighting should be moderate, and a secure lid is essential to prevent jumping. Rosy barbs tolerate a range of temperatures but prefer cooler water (20-24°C), making them suitable for unheated or subtropical setups in temperate climates.

Feeding

Rosy barbs are omnivorous and accept a wide variety of foods. Offer high-quality flake or small pellet foods as a staple, supplemented with frozen or live foods such as daphnia, brine shrimp, bloodworms, and mosquito larvae. Include vegetable matter such as blanched spinach, spirulina flakes, or algae wafers to support digestive health. Feed small amounts 2-3 times daily, ensuring all food is consumed within a few minutes. Rosy barbs are enthusiastic eaters and will readily accept most foods, but a varied diet supports optimal coloration, health, and breeding condition. Avoid overfeeding, which can lead to poor water quality and obesity.

Behaviour

Gold rosy barbs are active, peaceful, and social fish that thrive in groups of six or more. When kept in proper schools, they display natural behaviors, vibrant coloration, and reduced stress. Males may occasionally spar or chase each other, especially during breeding displays, but this is generally harmless and part of establishing dominance hierarchies. These barbs are constantly on the move, exploring the tank, foraging, and interacting with tankmates. They are best kept in species-appropriate groups—solitary or understocked rosy barbs may become shy, stressed, or slightly nippy toward long-finned tankmates. Proper schooling reduces fin-nipping and encourages natural, engaging behavior.

Tank Mates

Rosy barbs are compatible with a wide range of peaceful community fish of similar size and temperament. Suitable tankmates include danios, other robust peaceful barbs, larger rasboras, peaceful tetras, Corydoras catfish, and livebearers. Avoid slow-moving or long-finned fish such as bettas, fancy guppies, or angelfish, as rosy barbs may nip fins if kept in too-small groups or understocked. They are generally safe with larger snails and adult shrimp, though fry and eggs may be eaten. Do not house with aggressive cichlids or fin-nipping species. A well-planned community with appropriate stocking levels and group sizes results in a peaceful, vibrant display.

Breeding

Rosy barbs are egg scatterers that breed readily in well-maintained aquariums. Condition a breeding group (one or two males with two or three females) on high-quality live or frozen foods. Provide fine-leaved plants, spawning mops, or marbles on the tank bottom to catch eggs and protect them from adult predation. Spawning typically occurs in the early morning, with males chasing females and scattering eggs among plants or substrate. Remove adults immediately after spawning, as they will eat eggs and fry. Eggs hatch in 24-48 hours, and fry become free-swimming after 3-5 days. Feed fry with infusoria, liquid fry food, or finely crushed flakes, progressing to baby brine shrimp as they grow. Breeding rosy barbs is a rewarding project for aquarists of all experience levels.

Why Buy from Tropical Fish Co

Tropical Fish Co is the UK's premier destination for healthy, vibrant freshwater fish. Our gold rosy barbs are carefully sourced, quarantined, and conditioned to ensure robust health and stunning coloration. We provide expert care advice, fast nationwide delivery, and a live arrival guarantee. Whether you're setting up your first community tank or adding to an established aquarium, our team is here to support you every step of the way. Shop with confidence and join thousands of satisfied UK aquarists who rely on Tropical Fish Co for quality, service, and value. Order your rosy barbs today and experience the Tropical Fish Co difference.