Discus Cobalt Blue (Symphysodon Sp.)

Cobalt Blue Discus (Symphysodon sp.)

The Cobalt Blue Discus is the epitome of aquatic elegance. Known for its smooth, solid deep-blue coloration and striking red eyes, this variety brings a sense of calm and majesty to the aquarium. While it lacks the intricate patterns of the Turquoise or Checkerboard varieties, its strength lies in its uniform, high-saturation color. In a well-lit planted tank, a school of Cobalt Blues provides a stunning contrast that is simply unmatched by any other freshwater species.

Key Information

• Common Name: Cobalt Blue Discus

• Scientific Name: Symphysodon sp.

• Origin: Selective bred (Ancestry from the Amazon Basin)

• Max Size: 15–20 cm

• Lifespan: 10–15 years

• Temperament: Peaceful and social

• Diet: Omnivore – Requires high-protein foods like beef heart, bloodworms, and premium Discus granules.

• Care Level: Difficult (Requires consistent water quality)

Water Parameters

Parameter	Value
Temperature:	28–30°C
pH:	6.0–7.0
Hardness:	1–8 dGH
Minimum Tank Size:	200L+

Behaviour & Tank Compatibility

Discus are shoaling fish and must be kept in a group of 5–6 or more. They are gentle and slow-moving, often forming strong social bonds within their group. They should be kept with calm, heat-tolerant tank mates. Ideal companions include Cardinal Tetras, Rummynose Tetras, and Corydoras sterbai. Avoid fast-moving or aggressive fish that might compete for food or stress the Discus with high-speed activity.

Ideal Tank Setup

• Pristine Water Quality: Like all Discus, the Cobalt Blue requires a strict water change schedule to keep nitrates as low as possible.

• High-Quality Heating: Use dual heaters to ensure a stable, warm environment of 29°C.

• Vertical Structures: Use tall driftwood branches and vertical plants like Vallisneria to mimic the riverbanks of the Amazon.

• Subdued Lighting: Floating plants are recommended to diffuse the light, making the fish feel more secure and enhancing their deep blue glow.

• Soft Substrate: Fine sand is ideal for their natural foraging behavior.

Why Choose the Cobalt Blue Discus?

The Cobalt Blue Discus is for the hobbyist who values classic, bold color over complex patterns. Its deep blue hue is a perfect "pop" against a lush green background. They are highly interactive and will often come to the front of the glass to "greet" their owners. If you are looking for a fish that defines the "King of the Aquarium" title with grace and deep color, the Cobalt Blue is an exquisite choice.