The EZ-Pond EZ500i koi tank is a professional 500-gallon fibreglass quarantine and grow-on system designed for serious koi keepers and dealers. Built for durability and clarity, this infinity window tank provides a safe, controlled environment for monitoring fish health, treatment, and development.
Its heavy-duty construction ensures long service life, while the smooth internal finish protects koi during handling and isolation periods.
Infinity Window Koi Tank for Maximum Fish Visibility
This infinity window koi tank features a large laminated viewing panel measuring 1550mm × 850mm, allowing uninterrupted observation of fish behaviour, condition, and colour development.
Because of this, the tank is ideal for:
• Quarantine inspection
• Grow-on monitoring
• Dealer display systems
• Show preparation
The seamless window design also gives the system a premium, professional appearance.
Fibreglass Quarantine Tank with Bottom Drain
The fibreglass quarantine tank comes supplied with a 4-inch or 2-inch bottom drain, allowing efficient waste removal and easy integration with modern filtration systems.
A stainless steel fry guard is included as standard to protect smaller fish while maintaining unrestricted flow.
For custom installations, tanks can also be supplied without a drain.
Heavy-Duty Fibreglass Koi Tank Construction
Manufactured using reinforced fibreglass, this grow-on koi tank provides exceptional structural strength and long-term reliability.
Key benefits include:
• UV-resistant exterior coating
• Smooth gel-coat interior finish
• Strong reinforced shell
• Low maintenance requirements
This makes it suitable for both domestic quarantine systems and commercial dealer use.
EZ-Pond EZ500i Specifications
Capacity: 500 UK gallons
Material: Fibreglass
Viewing Panel: Infinity laminated window
Drain Options: 4” or 2”
Fry Guard: Stainless steel included
Dimensions
External Length: 1950mm
Internal Length: 1820mm
External Width: 1350mm
Internal Width: 1210mm
Overall Height: 1150mm
Internal Depth: 1000mm
Window Size: 1550mm × 850mm
Ideal Uses for This Koi Grow-On Tank
This infinity window quarantine tank is widely used for:
• Koi quarantine systems
• Grow-on tanks
• Dealer holding vats
• Indoor filtration setups
• Treatment and recovery systems
For best practice in quarantine procedures, see guidance from the
👉 https://www.fishhealthinspectorate.service.gov.uk (UK Government Fish Health Inspectorate)
Why Buy from West Midlands Koi
As a leading UK supplier of EZ-Pond systems, West Midlands Koi provides genuine stock, expert advice, and nationwide delivery. We can also help match compatible drum filters, pumps, and quarantine equipment.
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