This project was built and designed by Marcus from Salty Woodworking.
Frustrated with the flimsy particle board cabinets that come standard with most aquarium setups, Marcus decided to design and build his own from scratch. The result is a sturdy birch plywood cabinet and matching canopy made to support the weight of a large tank at a fraction of the cost of a store-bought option.
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Design
Marcus started by pointing out just how overpriced most commercial aquarium cabinets are, especially considering they’re often made from particle board that isn’t even waterproof. He wanted something stronger and more affordable, so he drew up his own plans and ran the measurements through a cutlist optimizer before heading into the shop.
Knowing that a fully stocked aquarium can weigh several hundred pounds once water is added, structural integrity was the top priority. Rather than reaching for dimensional lumber, he chose to build the entire cabinet out of birch plywood, arguing that plywood is plenty strong as long as the design directs weight straight down to the floor, similar to how a house transfers load through its framing.
Breaking Down the Panels
With the plans finalized, Marcus moved on to breaking down the plywood sheets. He credits a track saw as one of the most valuable tools in his shop, making quick and accurate work of cutting large panels down to size.
To help minimize tear-out on the plywood edges, he applied masking tape along the cut lines before running the saw through. It didn’t eliminate tear-out completely, but it noticeably reduced it compared to cutting without any tape at all.
Assembly
For this build, Marcus experimented with using dominoes to join the cabinet pieces together, something he hadn’t tried before. While the dominoes helped with alignment, he found the process took far longer than his usual methods, and ultimately switched over to brad nails and screws with glue for the remainder of the assembly.
The floors were secured using pocket screws, and the overall structure came together quickly once he ditched the domino joinery. For the doors, Marcus kept things simple with flat plywood slabs, cut square and finished later with edge banding, a look that mirrors many modern aquarium cabinet designs.
He also gave a shoutout to a self-centering drill bit, which he used for the first time on this project. It solved a longstanding frustration with misaligned cabinet hinge screws, making the hardware installation process much smoother.
Building the Canopy
To hide the tank’s lighting and wiring, Marcus built a matching canopy to sit on top of the aquarium. Constructed as a simple box, it rests on small support blocks placed directly on the glass and was assembled quickly using the same combination of glue, brad nails, and screws used elsewhere in the build.
Finishing
Before painting, Marcus disassembled the parts to add edge banding and fill screw holes with putty. He also admitted to a small mistake with one of the doors, having drilled a hinge pocket in the wrong location, but decided to live with it since the door would remain closed most of the time.
After sanding everything smooth, he applied several coats of primer followed by two coats of cabinet-specific paint in white, all applied with a roller. Despite not sanding between coats, the finish came out smooth with a slight sheen, proving that a quality roller technique can rival a sprayed finish when done carefully.
Marcus skipped a topcoat like polyurethane, and also didn’t wait for the recommended cure time before moving the cabinet upstairs, admitting his impatience after having the tank sit unused for over a month. Leveling feet were added to allow fine-tuning once the tank was placed, ensuring the water stays level as intended.
Final Assembly
With painting complete, the last steps involved attaching the doors, mounting the canopy, and installing a set of sleek door handles sourced online. The finished cabinet delivers a clean, modern look that fits well in the office space where it now lives.
Final Thoughts
This build is a great example of how a little planning and the right materials can produce a stronger, better-looking alternative to overpriced commercial products. Marcus’s approach shows that even furniture meant to support hundreds of pounds of water can be built confidently out of plywood, provided the design accounts for how weight is distributed.
For anyone tackling a similar project, this video offers plenty of insight into practical shortcuts, honest lessons learned along the way, and simple finishing techniques that produce professional-looking results without specialized equipment.
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Matt’s Take
These are my personal thoughts and tips based on my own experience in the shop. This section is not written, reviewed, or endorsed by the original creator of this project.
Marcus’s approach to load paths is exactly right, and it’s worth understanding why plywood works so well here. Baltic birch or cabinet-grade birch ply has consistent, void-free layers running in alternating directions, which gives it excellent dimensional stability and strength when the design keeps weight traveling straight down through vertical panels rather than relying on the panel itself to span a gap. For anyone considering a similar build, sticking with 3/4″ ply for the main carcass and doubling up in high-stress areas like where the floor meets the sides is a smart move.
The masking tape trick for tear-out is a great low-cost tip, but if you’re doing a lot of plywood breakdown, a sharp, high-tooth-count blade (60+ teeth) designed for plywood will make an even bigger difference. Combining both methods gives you the cleanest possible edge, especially important on visible cabinet parts.
On the domino experiment, that’s a common experience. Dominoes shine on face-frame or furniture joinery where precise alignment across multiple pieces matters, but for basic box construction, glue, brad nails, and screws are often faster and plenty strong since the plywood itself is doing most of the structural work.
One safety note worth repeating: any cabinet meant to hold a large aquarium should be checked for level in multiple directions before the tank ever goes on top, and rechecked periodically. Even a slightly uneven load on that much glass and water can create stress points over time. Leveling feet, like Marcus used, make this easy to dial in.