How Much Does It Cost to Keep Medaka? A Guide to Monthly Operating Costs | ブリちょく
Medaka| ✍️ BreederDirect Editorial
How Much Does It Cost to Keep Medaka? A Guide to Monthly Operating Costs
A breakdown of the monthly costs of keeping medaka, including food, containers, aquatic plants, and electricity for both indoor and outdoor setups. Learn how affordable it is to start keeping medaka.
Key Takeaways
A breakdown of the monthly costs of keeping medaka, including food, containers, aquatic plants, and electricity for both indoor and outdoor setups. Learn how affordable it is to start keeping medaka.
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Overview of Medaka Care Costs
Medaka are traditional Japanese freshwater fish that can be enjoyed in various styles, from outdoor lotus basins to full-scale indoor aquariums. Compared to tropical fish and goldfish, medaka require less equipment and are particularly cost-effective among pet fish.
The major cost divide is between outdoor and indoor keeping. Outdoor keeping has virtually no electricity costs and very low monthly maintenance, while indoor keeping requires lighting, filtration, and heaters, resulting in higher operating costs. Below, I'll explain initial costs and ongoing operational costs in detail. For the basics of care, please also see The Complete Medaka Care Guide for Beginners.
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Initial Cost Estimates
Outdoor Keeping
Outdoor keeping is the simplest method, with the appeal of requiring minimal equipment.
Plastic containers from dollar stores are sufficient to get started
Dedicated lotus basins or troughs (40–80L capacity) are around ¥1,000–¥3,000
Substrate (akadama soil, arakita soil): ¥300–¥500
Akadama soil stabilizes water quality and is beginner-friendly
Aquatic plants and spawning media: ¥300–¥1,000
Floating plants and stem plants such as water lettuce and anacharis are popular choices
These serve as spawning sites while also helping filter water and provide shade
Dechlorinator: ¥300–¥500 (one bottle lasts a long time)
Food (specialized powder feed): ¥300–¥500
Total initial cost for outdoor keeping: approximately ¥1,300–¥5,500
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Heater (for winter, with thermostat): ¥1,500–¥4,000
Substrate, aquatic plants, dechlorinator, and food: ¥1,000–¥2,000
Total initial cost for indoor keeping: approximately ¥6,000–¥22,000
Starter kits are sometimes cheaper than buying items individually.
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Monthly Operating Costs
Monthly Costs for Outdoor Keeping
The biggest advantage of outdoor keeping is having virtually no electricity costs. Sunlight serves as lighting, and green water (water with plant plankton growth) provides natural food, reducing feeding frequency.
In winter, medaka enter a dormant state and require no feeding, so annual average costs are even lower. For summer care tips, see also Medaka Summer Care | Heat Management Guide.
During spring through fall when heaters aren't used, electricity costs drop, so annual averages typically settle around ¥1,000–¥1,500 per month.
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Tips for Keeping Costs Down
Here are practical ways to maintain medaka more economically.
Make Outdoor Keeping Your Primary Method
Zero electricity costs are the biggest savings. Outdoors, sunlight naturally creates green water where plant plankton serves as food for medaka. This significantly reduces feed costs.
Breed Your Fish to Minimize Purchase Costs
Medaka spawn actively when water temperature exceeds 18°C. With plants and spawning media in place, they'll naturally lay eggs and fry are relatively easy to raise. Once you have a breeding pair, you can increase numbers without further purchases.
Propagate Aquatic Plants at Home
Floating plants and aquatic stem plants grow quickly—buy one plant and it multiplies. By dividing excess growth among multiple containers, you can reduce plant costs to essentially zero.
Use Multiple Containers for Separate Management
Separating breeding, fry, and adult containers improves survival rates and reduces costs long-term. Containers from dollar stores or agricultural troughs (inexpensive at hardware stores) are more than adequate.
Standard black and red medaka: approximately ¥10–¥100 per fish
Widely available varieties like royal red and white medaka: ¥100–¥300 per fish
Selectively bred varieties like tri-color shimmer, miyuki, and kirameki: ¥500–¥3,000 per fish
Award-winning show lines and rare varieties: ¥5,000–tens of thousands per fish
In the world of selectively bred medaka, there are many high-quality fish with distinctive coloring, luster, and fin shapes. It's recommended to start with affordable varieties to learn care techniques, then gradually upgrade to your preferred varieties.
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How Br-Choku Ensures Quality and Safety
On Br-Choku, you can purchase medaka directly from breeders nationwide. We offer rare selectively bred varieties rarely found in pet shops, as well as individual fish for collectors with specific lineage requirements.
Benefits of Using Br-Choku
Buy rare varieties directly: Access selectively bred varieties like tri-color shimmer, miyuki, and kirameki that rarely reach retail shops—sourced directly from breeders
Clear quality and lineage: Choose award-winning lines and pre-selected individuals with transparent quality assurance
Learn breeding expertise: Breeders share tips on breeding, selection, and water management, making it easy for beginners to start confidently
Fair pricing: Our direct-from-breeder model eliminates middlemen, ensuring prices match quality
Medaka keeping appeals most because both initial and ongoing costs are low and it's easy to start. Start with a simple outdoor setup, then expand to indoor tanks and selectively bred varieties as you gain experience.
