Guppy Breeding Guide 2026 — How to Breed Guppies Successfully in Cambodia

Why Breed Guppies in Cambodia?

Guppies (Poecilia reticulata) are the world's most popular aquarium fish — easy to breed, colorful, peaceful, and hardy. In Cambodia, quality guppies are in constant demand from hobbyists, aquarium shops, and the growing ornamental fish export trade. A single breeding pair of high-quality guppies produces 20-80 fry every 4-6 weeks. With proper selection and care, those fry become the next generation of breeders.

Cambodia's warm climate (26-30°C year-round without heating) is actually perfect for guppy breeding — they thrive at these temperatures and breed even faster in warmth than in temperate countries. Cambodian breeders have a natural advantage over competitors in cooler climates who must pay to heat their breeding racks year-round.

The economics are attractive: a quality pair of fancy guppies (moscow blue, yellow tuxedo, full red) costs $5-20 USD at the high end. Their offspring, raised with good genetics and care, sell for $2-8 USD per pair at aquarium shops or $3-12 USD to direct buyers via social media. A rack of 20 breeding tanks can generate meaningful supplemental income.

Selecting Breeding Stock

Start with the best quality guppies you can afford. Breeding mediocre guppies produces mediocre offspring. Buying one high-quality breeding pair and doing it right will produce better and more valuable fry than buying ten cheap pairs. Look for: intense color coverage with no fading or washed-out patches, symmetrical tail shape (no bent or torn finnage), strong body shape (no curved spine), and active, energetic behavior.

Choose a specific strain and focus on it. Guppy strains include: moscow blue, yellow tuxedo, full red, albino, platinum white, green cobra, and many others. Each has specific genetics that determine color and fin expression. Mixing strains produces variable offspring that are harder to sell as "quality" and harder to improve over generations.

The ideal male-to-female ratio for breeding is 1 male to 2-3 females. Males constantly pursue females for mating — a single female with multiple males will be harassed to exhaustion and death. Multiple females distribute the male's attention. In a dedicated breeding tank, use 1 male and 2 females.

In Cambodia, quality guppy breeders are found in Phnom Penh (Toul Tom Poung area, Facebook groups), Siem Reap, and Battambang. Import quality guppies also arrive from Thailand and Vietnam via fish traders in Phnom Penh's wholesale fish market. At 4848 One Shop, we stock curated breeding pairs of popular strains.

Breeding Tank Setup

A dedicated breeding tank does not need to be large. A 20-30 liter tank per breeding trio (1 male, 2 females) is sufficient. Use a sponge filter — it provides gentle filtration that fry cannot be sucked into. Keep the tank bare-bottom or with a thin layer of fine sand for easy cleaning.

Add dense floating plants or a breeding mop (yarn tied to a small float) to give females hiding places and to provide fry with cover when born. Java moss, hornwort, and water lettuce (all available in Cambodia) are excellent choices. Dense vegetation is the single most important factor in fry survival — without hiding places, the male and females eat most of the fry immediately after birth.

Maintain temperature at 26-28°C — guppies breed most prolifically in this range. Water should be neutral to slightly alkaline (pH 7.0-7.5) with some hardness. Adding a small amount of aquarium salt (0.5-1 teaspoon per 10 liters) is beneficial for guppies — they are brackish-tolerant and the salt reduces disease pressure.

Change 20-25% of the water weekly. Fry growth rate is directly linked to water quality — clean water with low nitrates produces faster-growing, healthier fry. In Cambodia's warm climate, waste breaks down faster and nitrates rise quickly, so consistency in water changes matters more than in cooler climates.

Gestation, Birth, and Fry Survival

Female guppies are livebearers — they give birth to fully formed, free-swimming fry rather than laying eggs. The gestation period is 21-30 days depending on temperature (faster in warmer water). A female guppy can store sperm and produce multiple batches of fry from a single mating. In Cambodia's warmth, expect a new birth every 3-4 weeks from a conditioned female.

A pregnant female develops a dark "gravid spot" near the anal fin as she nears birth — this is the eyes of the developing fry visible through the stretched body. When the gravid spot is very large and the female appears very "boxy" or square-shaped, birth is imminent (usually within 24-48 hours).

Fry are born over several hours, usually in the morning. A large, well-conditioned female can drop 40-80 fry in one batch. Immediately after birth, fry instinctively swim up toward light and to plants for cover. The parents — and other tank mates — will eat any fry they can catch. Dense vegetation provides the only protection in a community breeding setup.

For maximum fry survival, move the pregnant female to a separate birth tank (10-15 liters, well-planted) 1-2 days before expected birth. After she drops the fry, remove the female immediately and return her to the main tank. The birth tank now holds only fry — they can be raised safely here for the first 4-6 weeks.

Raising Fry and Selecting for Quality

Fry growth rate depends on: feeding frequency (4-6 small feedings daily produces faster growth than 2 feedings), water quality (target near-zero ammonia and nitrate below 20 ppm), and temperature (28°C produces faster growth than 24°C — Cambodia's natural climate is advantageous here).

At 2-3 weeks old, male fry begin developing their color and tail. This is when selection begins. Cull (remove) fish with: bent spines, deformed fins, poor color coverage, or wrong body shape for the strain you are breeding. Culled fish can be sold cheaply as feeder fish or grown in a separate tank — do not discard them unless diseased.

At 6-8 weeks old, males show enough color to make selection decisions. Keep only the best 30-40% of males for future breeding. The selected males should have: full color coverage, symmetrical and undamaged finnage, strong body shape, and active behavior. These become your next generation of breeders. The remainder are sold as pet-quality fish.

Separate males from females at 4-6 weeks old, before the males reach sexual maturity. If you leave mixed fry tanks too long, the first maturing males will breed with females before you can evaluate quality — producing offspring that dilute your selective breeding program.

Selling Guppies in Cambodia — Market and Pricing

Cambodia's ornamental fish market is growing rapidly. Primary sales channels for small-scale guppy breeders: aquarium shops in Phnom Penh (buy at $0.50-2 per fish, sell to customers at $2-8 per pair), Facebook marketplace and groups (direct to hobbyists, better prices), Telegram fish groups, and occasional export via fish traders.

Pricing in Cambodia (2026): Common mixed-strain guppies: $0.50-1 per pair. Basic fancy guppies (moscow, cobra): $2-4 per pair. High-quality show guppies with clear strain: $5-15 per pair. Import-quality Japanese or Thai strain guppies: $10-30 per pair from specialist suppliers.

To command premium prices, invest in photography — clear photos of your fish against a dark or white background showing full color and fin shape sell fish much faster than blurry tank shots. Natural light from a window (no flash) produces the best results without special equipment. Include the parent photos when selling breeding pairs.

At 4848 One Shop, we work with local guppy breeders across Cambodia to source quality strains and connect breeders with buyers. If you produce quality guppies and want a reliable sales channel, contact us on Telegram — we are always looking to add new suppliers.