The Red Diamond Discus is a premium selectively bred discus variety known for its intense ruby-red coloration, elegant round body shape, and strong ornamental value in high-end freshwater aquariums.

Overview

• Scientific genus: Symphysodon

• Type: Fancy discus strain

• Origin: Captive-bred ornamental variety

• Adult size: 15–20 cm (6–8 inches)

• Lifespan: Around 10–15 years with proper care

Red Diamond Discus are highly sought after because of their deep saturated red coloration and relatively clean body patterning.

Appearance

Main characteristics:

• deep red to ruby-red body

• smooth disc-shaped profile

• minimal striping or patterning

• flowing dorsal and anal fins

Some specimens may show:

• slight blue fin edging

• faint facial markings

• orange-red highlights

• metallic sheen under strong lighting

High-quality fish usually display:

• even solid coloration

• strong circular body shape

• thick body structure

• clean finnage

• minimal stress bars

Young fish often become more intensely colored as they mature.

Temperament

Red Diamond Discus are:

• peaceful

• social

• intelligent

• mildly shy

Like all discus:

• they should be kept in groups

Recommended:

• at least 5–6 discus together

Group keeping helps reduce stress and aggression.

Aquarium setup

They require large stable aquariums with excellent water quality.

Minimum tank size

• Around 200 liters (55 gallons) minimum for a small group

• Larger tanks are strongly preferred

Ideal setup

• strong biological filtration

• warm stable temperature

• gentle water movement

• open swimming space

Popular décor:

• driftwood

• Amazon-style aquascapes

• broad-leaf plants

• dark substrate for color contrast

Red discus often appear especially vibrant against darker backgrounds.

Water parameters

Excellent water quality is essential.

Recommended conditions:

• Temperature: 28–31°C

• pH: 5.5–7.0

• Soft to moderately soft water

• Ammonia/Nitrite: 0

• Low nitrate levels

Discus are sensitive to:

• unstable conditions

• sudden water changes

• poor maintenance

• temperature fluctuations

Frequent water changes are critical for long-term health.

Diet

Red Diamond Discus require high-quality protein-rich foods.

Common foods:

• premium discus pellets

• frozen bloodworms

• brine shrimp

• blackworms

• discus gel foods

• beef heart blends

For enhanced red coloration:

• carotenoid-rich foods may help

• varied nutrition is important

Juveniles generally need multiple feedings daily for proper growth.

Compatibility

Suitable tankmates:

• cardinal tetras

• rummy nose tetras

• peaceful corydoras

• small peaceful plecos

• calm warm-water fish

Avoid:

• aggressive cichlids

• fin nippers

• overly active species

• coldwater fish

Tankmates must tolerate discus temperatures.

Breeding

Red Diamond Discus breed similarly to other discus strains.

Breeding process:

1. Pair formation

2. Cleaning spawning surface

3. Egg laying

4. Egg guarding

5. Fry attachment to parents

Like all discus:

• fry feed from mucus secreted on the parents’ skin during early development.

Successful breeding requires:

• pristine water quality

• low stress

• stable warm temperatures

Common health problems

Stress darkening

Can occur due to:

• bullying

• unstable water conditions

• poor maintenance

Hole-in-the-head disease

Associated with:

• nutritional deficiencies

• chronic stress

• poor water quality

Parasites

Common concerns include:

• gill flukes

• internal worms

• protozoan infections

Quarantine for new fish is strongly recommended.

Care difficulty

Red Diamond Discus are considered:

• intermediate to advanced fish

Main challenges:

• maintaining pristine water

• disease prevention

• stable warm temperatures

• intensive feeding and maintenance

They are usually not ideal beginner fish.

Difference from Red Melon Discus

Compared to Red Melon Discus:

• Red Diamond Discus often show deeper ruby-red coloration

• Red Melon strains may appear more orange-red or lighter

Both have very similar care requirements.

Why aquarists value them

Red Diamond Discus are admired for:

• intense red coloration

• elegant swimming behavior

• luxury ornamental appearance

• centerpiece display potential

A healthy mature group in a large warm aquarium creates one of the most visually dramatic freshwater displays in the aquarium hobby.