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Blue Diamond — discus turquoise-blue Symphysodon sp. | discus encyclopedia
Turquoise / Blue

Blue Diamond

Symphysodon sp.

Medium

Description

The Blue Diamond impresses with its solid color, featuring a uniform electric blue without any stripes or bars. It is likely the most recognizable discus variety worldwide.

🌍 Origin & History

The Blue Diamond originated in Southeast Asian breeders in the early 1990s and quickly became one of the most popular varieties in the world. It was introduced to the international market around 1992. It comes from the intense selection of specimens with solid blue color from turquoise lines.

Appearance

The entire body is covered with metallic blue scales, with no visible stripes or bars. The color ranges from deep cobalt blue to electric turquoise blue, with a strong metallic sheen. It does not exhibit vertical stress bars. Red eyes are highly desirable. The fins are blue, transparent at the edges. The body is symmetrical and well-rounded.

🧬 Genetic background

The Blue Diamond gene is recessive. It originates from Turquoise Blue discus through selection for the complete elimination of vertical bars and the unification of solid color. Crossing two Blue Diamonds produces 100% Blue Diamond offspring. When crossed with other varieties that have vertical bars, the offspring may carry the Blue Diamond gene without expressing the solid color.

Recommended water parameters

pH
6.2–7
TDS
120–220 ppm
Temperature
28–30°C
GH
3–8 °dGH
⚠ Don't chase the exact water values — stability is what matters most. Discus from European farms are already used to harder water with a higher pH.
14–18 cm
Size
10–15 ani
Lifespan
200L
Min. tank

Care

Relatively robust compared to other varieties. It tolerates a broader range of parameters than delicate strains.

Breeding

Prolific in good conditions. Pairs form stable bonds. Two Blue Diamonds produce 100% Blue Diamond offspring.

💡 Practical tips

  • →A black background maximizes the blue color
  • →Blue lighting enhances the metallic sheen
  • →Avoiding crossing with bar varieties maintains solid color in offspring

Products for this variety

Filters, food, tests and treatments for discus

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