A spacious home built for happy, growing fish.
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Strong, roomy, and ready for your next big aquatic project.
The MK Aquarium 320 Gallon Heavy-Duty Fish Breeding Tank gives your fish a safe and roomy space to grow. Its stainless steel frame, tough PVC canvas, and clear viewing panel make it great for koi, large pets, breeding setups, or aquaponics systems. It works indoors or outdoors and keeps care simple with a handy side drain.
Built to handle real aquaculture life.
✔ Clear front panel for easy viewing
✔ Rust-proof stainless steel frame
✔ Strong PVC canvas for long-term use
✔ Great for koi, aquaponics, and large fish
✔ Simple water changes with side drain
Size: 78.7in × 39.4in × 23.6in. Holds 320 gallons. Check the tank canvas and frame regularly and clean surfaces as needed. UV coating helps outdoor use. Includes all parts for setup; use the Allen key and wrenches to assemble.
We are proud to offer duty-free, reliable, tracked shipping— delivered to your door in over 200 countries worldwide!
Below you can check our average shipping times:
Domestic USA Shipping: 2-9 business days
US & Canada: 7-18 days
Europe: 7-18 days
Europe Plus*: 8-30 days
Australia, New Zealand: 7-18 days
Hong Kong, Singapore: 7-18 days
Rest of the world: 8-30 days
*does not include processing times up to 2 business days or longer in peak periods
Primarily we ship out from fulfillment centers in the United States, Eastern Asia and Western Europe. If the item you've purchased is out of inventory in your nearest location, we'll send it directly from our production lines at the same delivery times as stated in our shipping section.
Can this tank be used outdoors?
Yes. The rust-proof frame and UV-coated canvas make it suitable for outdoor aquaculture or aquaponics setups.
Is the clear panel durable?
The panel is made with thick hot-melt PVC, giving you a strong window for easy viewing.
How hard is it to assemble?
It comes with brackets, connectors, hooks, and tools. Most hobbyists can set it up with simple tightening steps.
Choose the right size for your Koi show or aquaculture project. Our size chart helps you select the best fit.
Contact us today at: support@mkaquariumstore.com to discuss your custom requirements and get a personalized quote.
Just unfold, connect, and fill – your tank is ready in minutes!
The clear panel lets you check on fish without disturbing them.
Stainless steel and strong PVC canvas stand up to daily use.
Plenty of room for koi, breeders, and aquaponics projects.
A side drain and valve make routine care stress-free.
Rust-proof materials and UV coating give you flexible placement.
Stronger materials. Better viewing. Easier care.
| Features | MK Aquarium | Knock-Offs |
|---|---|---|
| Large 320-gallon capacity | ||
| Stainless steel frame | ||
| Thick PVC canvas | ||
| Clear viewing panel | ||
| Side drain and valve | ||
| UV coating for outdoor use | ||
| Complete assembly kit included | ||
| Rust-proof materials | ||
| Stable frame support |
Turn your tank into a stunning display. Crystal-clear panels let your fish shine from every angle.
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.
Yes. Its size and strength make it a great choice for koi and other large fish.
The canvas removes from the frame, so you can store it when not in use.
Yes. The solid PVC canvas is made for aquatic use and holds up well to daily water pressure.
Use the built-in side drain and valve to make quick, easy water changes.
The frame and canvas stay stable with typical aquarium or aquaponics pumps.
The tank comes with an Allen key and two wrenches, so you have what you need to start.
Yes. The large space and strong materials make it a good base for an aquaponics system.
Use gentle wipes or a soft cloth so the PVC stays clear and scratch-free.
The UV coating helps protect the canvas during outdoor use.
