Blue Heckel Discus (Symphysodon discus) 10cm

Overview

The Blue Heckel Discus (Symphysodon discus) is one of the most iconic and sought-after freshwater aquarium fish, admired for its round body shape, graceful movement and refined blue patterning. This 10cm specimen is a superb choice for experienced aquarists looking to keep a true centrepiece fish with character and presence. Heckel Discus are known for their calm nature, social behaviour and preference for stable, warm water conditions.

Unlike many hardy community fish, discus reward careful husbandry with exceptional colour, confident feeding and natural behaviour. They are best kept in a mature, well-filtered aquarium with gentle tank mates and a consistent routine. If you are looking for a premium display fish with real impact, the Blue Heckel Discus is a standout choice.

All fish are supplied with our live arrival guarantee and fast UK delivery, so your new discus arrives in the best possible condition.

Care at a Glance

Origin & Natural Habitat

Discus originate from the slow-moving blackwater and floodplain waters of the Amazon basin in South America, particularly in areas of Brazil, Peru and Colombia. In the wild, they inhabit calm, warm, heavily vegetated waters with submerged roots, leaf litter and low mineral content. These environments are typically shaded and rich in natural cover, which helps explain the discus’ preference for subdued lighting and a peaceful setting.

Heckel Discus are especially associated with soft, acidic waters and stable tropical temperatures. Their natural habitat is not a fast-flowing river channel, but rather quiet backwaters and forested floodplains where they can move slowly in groups and feed on small invertebrates, plant matter and organic detritus. Replicating these conditions in the aquarium is the key to long-term success.

Tank Setup & Water Parameters

A discus aquarium should prioritise stability, cleanliness and gentle water movement. A mature tank with excellent biological filtration is essential, as discus are sensitive to poor water quality and sudden changes. A group of six or more is ideal, as discus are social fish that feel more secure when kept together.

Use soft, warm water with a slightly acidic to neutral pH. Regular partial water changes are important to maintain pristine conditions and support healthy growth and colour. Fine sand or a smooth substrate works well, and the tank can be decorated with driftwood, broad-leaved plants and open swimming space. Avoid sharp ornaments or aggressive tank layouts that may cause stress.

Dim lighting, floating plants and a calm environment will help these fish settle and display naturally. Because they prefer warmth, choose tank mates that can tolerate higher temperatures and do not compete aggressively for food. A tightly covered aquarium is recommended to reduce stress and prevent jumping.

Key parameters for best results:

• Temperature: 28–30°C
• pH: 6.0–7.0
• Soft to moderately soft water preferred
• Strong filtration with gentle flow
• Regular maintenance and stable conditions

Feeding Guide

Blue Heckel Discus are omnivorous and do best on a varied, high-quality diet. In the aquarium they readily accept specialist discus pellets, frozen foods such as bloodworm, brine shrimp, mysis and daphnia, and carefully selected prepared foods. A varied diet supports colour, growth and immune health.

Feed small amounts two to three times daily, offering only what the fish can consume quickly. Discus have a relatively delicate digestive system, so overfeeding and poor-quality foods should be avoided. Many keepers also include vegetable-based foods and premium gel foods to broaden the diet and improve condition. Consistency is important; discus thrive when fed regularly with high-grade nutrition.

Tank Mates / Compatibility

Discus are peaceful fish and should be housed with calm, non-nippy species that enjoy warm water. Good companions include cardinal tetras, rummy nose tetras, pencilfish, Corydoras sterbai, peaceful dwarf cichlids and other gentle Amazonian species. Always ensure tank mates are not too boisterous at feeding time, as discus can be shy and slower to compete.

Avoid fin-nippers, highly active fish, aggressive cichlids and species that prefer cooler water. Barbs, many livebearers, large plecs and territorial fish are generally poor choices. It is also best to avoid mixing with very small fish that may be eaten or stressed, especially in a display tank where discus are the main feature.

For best results, keep discus in a species-focused or carefully planned South American community aquarium with stable warmth, soft water and plenty of open swimming space.

Why Buy from Tropical Fish Co

At Tropical Fish Co, we specialise in healthy, well-conditioned aquatic livestock selected for quality and reliability. Our Blue Heckel Discus are sourced and handled with care to help ensure they arrive in excellent condition and settle well into their new home. We understand how important it is to receive premium fish that are accurately identified, properly packed and supported by knowledgeable service.

When you order from us, you benefit from fast UK delivery, a live arrival guarantee and expert support from a team that understands the needs of delicate tropical fish. Whether you are building a dedicated discus display or adding a true showpiece to an established aquarium, you can buy with confidence knowing your fish has been prepared for a safe journey and a strong start in your tank.