How Much Does Goldfish Keeping Cost? Monthly Running Costs Explained

Goldfish have been beloved pets in Japan for centuries and are popular as relatively easy-to-keep ornamental fish. However, many people have experienced goldfish from festivals not living long, making proper care environments essential. Here is a detailed breakdown from initial setup to running costs.

Initial Setup Cost Estimates

• Aquarium (45-60cm): 2,000-8,000 yen (goldfish grow surprisingly large, so choose a generous size)
• Top filter / external filter: 2,000-5,000 yen (goldfish foul water easily, requiring strong filtration)
• Air pump and air stone: 1,000-2,000 yen (for oxygen supply and water circulation)
• Substrate / gravel: 500-1,500 yen
• Thermometer: 300-500 yen
• Dechlorinator and bacteria starter: 1,000-1,500 yen

The total initial setup cost is estimated at 10,000-20,000 yen. For premium varieties like ranchu or Edo nishiki, the fish themselves can cost tens of thousands of yen.

Monthly Running Costs

• Fish food: 200-500 yen (dedicated flake or pellet food)
• Electricity: 500-1,500 yen (filter, air pump, winter heater costs)
• Dechlorinator: 100-300 yen
• Filter consumables (filter wool, etc.): 200-400 yen

The monthly maintenance cost totals 1,000-3,000 yen, making it one of the most economical ornamental fish to keep.

Tips for Saving Money

• Choose a larger tank: More water volume stabilizes water quality and reduces disease risk, saving on medication costs long-term
• Perform diligent water changes: Thorough weekly or biweekly water changes can significantly cut consumable and medication costs
• Avoid overfeeding: Leftover food is the primary cause of water quality deterioration; feed small amounts twice daily
• Consider outdoor keeping (water lily pot): Zero electricity costs, low setup costs, and especially easy to manage in summer

Benefits of Buying on Buri-Choku

On Buri-Choku, you can purchase goldfish directly from breeders.

• Quality specimens at fair prices: Obtain specialty varieties like ranchu and unusual patterns directly from breeders
• Clear breeding history and lineage: Breeder-managed specimens have documented care environments and reliable health records
• Excellent after-purchase support: Get direct advice for care questions and troubleshooting