The Marlboro Red Discus is a popular selectively bred discus variety known for its bold red-orange coloration combined with a pale or white facial region. It is one of the classic ornamental discus strains in the aquarium hobby.

Overview

• Scientific genus: Symphysodon

• Type: Fancy discus strain

• Origin: Captive-bred ornamental variety

• Adult size: 15–20 cm (6–8 inches)

• Lifespan: Typically 10–15 years with proper care

The strain became famous because of its strong contrast between the red body and lighter face pattern.

Appearance

Key features:

• bright red to orange-red body

• pale cream or white face

• rounded disc-like shape

• flowing dorsal and anal fins

High-quality specimens usually display:

• intense even body coloration

• smooth transition between facial and body colors

• balanced circular body shape

• minimal dark stress markings

Young fish may appear less colorful until maturity.

Origin of the name

The “Marlboro” name comes from the fish’s coloration resembling the red-and-white color contrast associated with old cigarette branding aesthetics. It is purely a trade name and not a scientific classification.

Temperament

Marlboro Red Discus are:

• peaceful

• social

• intelligent

• somewhat timid

They should ideally be kept in groups.

Recommended:

• 5–6 or more discus together

Keeping them singly often increases stress and shyness.

Aquarium requirements

Discus need stable and extremely clean aquariums.

Tank size

• Minimum ~200 liters (55 gallons) for a group

• Larger tanks are strongly preferred

Ideal setup

• strong biological filtration

• gentle water movement

• warm stable water

• open swimming areas

Suitable décor:

• driftwood

• vertical structures

• broad-leaf plants

• planted discus layouts

Many breeders also use bare-bottom tanks for easier maintenance.

Water parameters

Water quality is critical.

Recommended conditions:

• Temperature: 28–31°C

• pH: 5.5–7.0

• Soft to moderately soft water

• Ammonia/Nitrite: 0

• Low nitrate levels

Discus react badly to:

• unstable conditions

• poor maintenance

• sudden temperature swings

Frequent water changes are essential.

Diet

Marlboro Red Discus require nutritious, protein-rich feeding.

Common foods:

• discus pellets

• frozen bloodworms

• brine shrimp

• blackworms

• beef heart blends

• premium frozen foods

For strong coloration:

• varied diet helps

• carotenoid-rich foods improve reds and oranges

Juveniles often require multiple feedings daily.

Compatibility

Good tankmates:

• cardinal tetras

• rummy nose tetras

• peaceful corydoras

• peaceful plecos

• calm warm-water fish

Avoid:

• aggressive cichlids

• fin nippers

• highly active species

• coldwater fish

Tankmates must tolerate discus temperatures.

Breeding

Like other discus:

• they are substrate spawners

• parents care for eggs and fry

Breeding process:

1. Pair formation

2. Surface cleaning

3. Egg laying

4. Egg guarding

5. Fry attachment to parents

A notable discus trait:

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

Successful breeding requires:

• pristine water

• low stress

• consistent warm temperatures

Common health issues

Stress darkening

Can occur from:

• bullying

• poor water quality

• sudden environmental changes

Hole-in-the-head disease

Often linked to:

• nutritional deficiencies

• chronic stress

• poor maintenance

Parasites

Common concerns:

• gill flukes

• internal worms

• protozoan infections

Quarantine for new fish is strongly advised.

Care difficulty

Marlboro Red Discus are considered:

• intermediate to advanced fish

Main challenges:

• maintaining excellent water quality

• disease prevention

• stable warm conditions

• high feeding requirements

They are generally not beginner fish.

Difference from Red Melon Discus

Compared to Red Melon Discus:

• Marlboro Reds usually have a distinct pale face

• Red Melons tend to show more uniform coloration across the body

Care requirements for both strains are almost identical.

Why aquarists like them

Marlboro Red Discus are valued for:

• dramatic red-and-white contrast

• elegant swimming behavior

• strong centerpiece presence

• social discus interactions

A mature healthy group in a large warm aquarium creates a very striking display.