Buy Koi Fish Online – Premium Japanese Koi for Ponds & Aquariums

Looking to buy koi fish in Australia? Zen Aquarium is one of the largest suppliers of koi fish in NSW, offering a wide range of live koi fish for sale in vibrant colours and patterns. Whether you’re building a peaceful koi pond or upgrading your freshwater aquarium, our koi fish are a stunning natural addition to any outdoor or indoor space.

Why Choose Zen Aquarium for Koi Fish? We work directly with trusted koi farmers to offer wholesale prices and superior quality fish you won’t find at typical pet shops. Our koi are hand-selected for their colour, health, and pattern variety. As one of the top koi fish suppliers in NSW, we’re proud to deliver premium koi that thrive in Australian ponds and aquariums.

Koi Fish Benefits:

• Natural filter feeders that help keep water clean

• Known to reduce stress and improve mood with their calming presence

• Hardy and disease-resistant, ideal for garden ponds

• A beautiful centrepiece in any water garden or aquascape

• Traditionally considered a symbol of good luck and prosperity

Our Range: Choose from a wide selection of Japanese koi fish, including butterfly koi and other popular varieties. Fish are available in a range of sizes (approx. 10–18 cm) and colour patterns. We update our stock weekly, so there’s always something new to discover.

Important Info Before You Buy:

• Koi fish are only available to customers in NSW and ACT – do not purchase if you live outside these states. No exceptions.

• Koi must be kept in pairs or groups – they are social fish and should never be kept alone.

• A dedicated koi pond or large freshwater aquarium is required. Koi can grow up to 1 metre in length.

• Clean, filtered water and proper acclimation are essential for their health.

• Ideal setups include plants, shelter, and stable water temperature.

How to Order:

• Order directly through our website or visit us in-store at Zen Aquarium.

• Weekly photos and videos of new arrivals are posted on our Facebook and Instagram.

• Prices range from $5 – $150, depending on variety and size. (In store Sunday)

Please read our full shipping policy before placing an order.
NSW/ACT orders only – orders outside these regions will be cancelled.

This will be deleted from your cart and your money refunded or your whole order will be cancelled. Also if you have paid with Paypal, Paypal fees will not be refunded.