ᐅ KALLAX Load Capacity with Aquarium – Has the Limit Been Exceeded?

Hello everyone,

I have recently considered using an IKEA KALLAX shelving unit as a base for my aquarium and am now wondering if its load capacity is really sufficient. My aquarium will be a standard tank holding about 120 liters (32 gallons) of water, plus the cabinet underneath, equipment like filter and lighting, so the total weight quickly reaches around 150 kg (330 lbs) or more.

My specific question is: Does placing a 120-liter (32-gallon) aquarium including equipment and accessories on a single KALLAX shelf exceed the unit’s load capacity threshold to the point that it could be structurally compromised or at least suffer long-term material damage? Are there any experiences or tests that clarify what realistic weight limits are and how the weight distribution (e.g., even or point load) affects this?

I would appreciate assessments and firsthand reports, and also welcome recommendations for alternative shelving systems suitable for this purpose. Thanks in advance!

Paxton_fo schrieb:
If you place a 120-liter (32-gallon) aquarium including equipment and accessories on a single KALLAX shelf, does it exceed the shelf's load capacity threshold?

The KALLAX shelf is designed to hold a maximum of 13–15 kg (28–33 lbs) per compartment, which in total is significantly less than 150 kg (330 lbs). Therefore, you would greatly exceed the load limit. I would not recommend using that shelf for this purpose.

I understand the concerns about using a KALLAX unit for a 120-liter (32-gallon) aquarium. The load-bearing limits of this furniture are not designed for such weights, especially if the load is not evenly distributed.

When supporting tanks filled with water, it is crucial to know the static load capacity. 120 liters of water mean about 120 kilograms (265 pounds) of weight alone, plus equipment and aquarium materials. KALLAX shelves are made of particleboard-like materials and are designed for decoration or books on lighter shelves.

This often causes the shelves under load to bend or even the joints to loosen over time, which can lead to accidents. It becomes particularly critical if the aquarium rests on only a few support points.

As an alternative, I would recommend more robust cabinets, such as custom-made wooden or metal stands designed specifically for aquariums. If you still want to use a KALLAX, the load can be improved with additional sturdy panels and cross braces, but this requires effort and no longer represents the original condition.

Lastly, always make sure the load is well distributed across multiple legs or support areas to ensure a stable base.

GU-LAU60 schrieb:
The KALLAX is designed for a maximum of 13–15 kg per compartment

This information is correct and matches the manufacturer’s specifications. Each compartment can hold this load, so for 4 compartments that theoretically amounts to about 60 kg ideally distributed, no more.

GiRoyce schrieb:
120 liters of water means around 120 kg plus equipment

Adding the extra weight from aquarium glass and decorations, the total quickly exceeds 150 kg.

For structural safety, this represents a significant overload. The shelves are made of MDF and particleboard, which can suffer permanent damage under such heavy weight.

My advice: For aquariums over 100 liters, it’s best to use aquarium cabinets specifically designed for this purpose or a sufficiently sturdy wooden or metal frame. KALLAX shelves are not suitable for aquariums, except perhaps for much smaller tanks around 30 liters, if at all.

Many aquarium hobbyists have reported warped shelves, cracked panels, and unstable constructions with this kind of use. I would advise against it in the long run.