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MK 500 Gallon Heavy-Duty Above Ground Fish Pond, Aquaculture & Fish Breeding Tank, Large Aquarium (78.7 x 59.1 x 23.6 in)

MK 500 Gallon Heavy-Duty Above Ground Fish Pond, Aquaculture & Fish Breeding Tank, Large Aquarium (78.7 x 59.1 x 23.6 in)

A roomy and reliable tank for happy, growing fish

Regular price $790.00 USD
Regular price $948.00 USD Sale price $790.00 USD
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Duty & Taxes Included: The listed price covers delivery to your door.
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Built tough for busy breeding seasons and big aquatic pets.
This 500-gallon MK Aquarium breeding tank gives your fish a roomy, safe space to grow. Its stainless steel frame and strong PVC canvas handle everyday use indoors or outdoors. A clear front panel lets you check on your fish easily, and the side drain makes water changes simple. Great for koi, breeding projects, or a full aquaponics system.

A steady home for serious fish keepers.
 ✔ Large 500-gallon capacity
 ✔ Clear viewing panel
 ✔ Easy water changes with drain valve
 ✔ Durable stainless steel frame
 ✔ Ready for aquaculture or aquaponics

Care & Sizing

Tank measures 78.7 in × 59.1 in × 23.6 in. Rinse before first use and keep the canvas clean with gentle wiping. Store dry when not in use to protect the UV coating.

Shipping & Delivery

We offer reliable tracked shipping delivered to your door in 200+ countries.

Processing time: up to 2 business days (may be longer during peak periods).

Estimated delivery times (after dispatch)

  • USA (warehouse stock): 2–9 business days
  • USA (standard orders): 2–4 weeks
  • US & Canada: 2–4 weeks
  • Europe: 2–4 weeks
  • Australia & New Zealand: 2–4 weeks
  • Hong Kong & Singapore: 2–4 weeks
  • Rest of the world: 3–4 weeks

We ship from fulfillment centers in the United States, Eastern Asia, and Western Europe. If an item is out of stock in your nearest location, we’ll ship it from another location or production within the same delivery ranges above.

Is this tank good for koi or larger fish?
Yes, the 500-gallon space and strong frame make it great for koi and other big aquatic pets.



Find the Perfect Size for Your Needs

Choose the right size for your Koi show or aquaculture project. Our size chart helps you select the best fit.

  • Custom Sizes: Get a tank that perfectly fits your space and requirements.
  • Special Features: Add functionalities to meet specific use cases like breeding, aquaponics, or large-scale aquaculture.
  • Bulk Orders: Enjoy competitive pricing for wholesale or bulk purchases.

Contact us today at: support@mkaquariumstore.com to discuss your custom requirements and get a personalized quote.

Assembly Made Effortless!

Just unfold, connect, and fill – your tank is ready in minutes!

Durability You Can Trust

Built with patented PVC, tested in real freezing conditions, and made to handle weight, weather, and everyday wear.

Easy viewing

A clear front panel lets you check on your fish without disturbing them.

Indoor or outdoor use

UV coating helps the canvas stay strong in bright outdoor spaces.

Simple draining

A side drain and valve make water changes fast and clean.

Great for aquaponics

The large space supports a healthy aquaponics or breeding setup.

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Strong enough for the outdoors. Beautiful enough for your space.

A long-lasting pond built for daily use and designed to look great for 5+ years with proper care.

  • Built for cold, freezing weather: Especially suited for northern states and low-temperature outdoor conditions.
  • Freeze tested: Our tanks have been tested in natural freezing conditions where ice formed up to approximately 20 cm (8 inches) thick, without cracking, leakage, or structural damage.
  • Leak-proof and tear-resistant: Made for dependable long-term use.
  • Heavy-duty patented PVC: Strong, durable material built for demanding environments.
  • Collapse-resistant strength: Built to handle 500 kg+ of weight with proper support.
  • Aquascaping friendly: Suitable for use with rocks, sand, gravel, and other aquascaping materials.
  • Flexible design: Easy to style and set up the way you want for your own pond or tank layout.

Why choose MK Aquarium?

Thoughtful design built for long-term aquatic care.

Features MK Aquarium Knock-Offs
Large 500-gallon capacity
Stainless steel frame
Clear viewing panel
UV-coated PVC canvas
Easy-drain side valve
Strong nylon mesh support
Includes full install kit
Indoor and outdoor use
Stable for aquaponics

Showcase Your Beautiful Fish

Turn your tank into a stunning display. Crystal-clear panels let your fish shine from every angle.

MK Filters Hero

Triple-Layer PVC Mesh Strength Structure

Engineered for maximum durability, our tanks combine a tough PVC outer coating, tear-resistant nylon layer, and leak-proof protection for total peace of mind.

  • Guaranteed No-Leak Protection – tear resistant Nylon PVC ensures watertight performance.
  • Straps & Hooks Included – 160-gallon and larger models are reinforced with secure straps for extra durability.
  • Metal Brackets for Extra Strength – ensures long-lasting stability and structural support.

FAQ I Everything you need to know

How long does setup take?

Most people set it up in under an hour using the included tools and manual.

Is the canvas strong enough for long-term use?

Yes, the PVC canvas with nylon mesh is made for steady, everyday use.

Can I move the tank once it’s filled?

It’s best to drain the water first, then move it carefully with help.

Is this safe for young fish or fry?

Yes, the smooth interior and roomy layout make it friendly for fry and breeders.

How do I clean the canvas?

Use gentle wiping with clean water. Avoid harsh cleaners.

Does sunlight affect the tank?

The UV coating helps the canvas stay strong outdoors.

Can it connect to an aquaponics system?

Yes, the large capacity and stable frame work well with many aquaponics setups.

Will it rust?

The stainless steel frame resists rust in normal use.

Does it need special flooring?

A flat, stable surface is all you need before filling it with water.