Another economical idea I'm thinking of is using the Ikea HAVSTA cabinet
Why not but I am skeptical. Read below. I would rather do what Marcel did. Those pipes will not only last but will be extremely strong. You could add over 20 tanks on top of that structure that it would not budge. Dont quote me on the number, you get the idea!
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Instead of using the base that comes with the cabinet for the base of the cabinet (12 cm height), use it to reinforce at the top - trim the front and back panels to fit inside the cabinet's width, and mount as a support right under the cabinet top width-wise at the front and rear (screwed in from the cabinet's sides)
- Trim the two side panels to fit between these two panels and screw them together to form an H underneath the cabinet top
- Guess I could also use 2 x 4 lumber for this type of reinforcement
Yes could work and I would say required.
Personally I would definitely not use those because you would be focusing all the weight in 4 points rather than distributing the weight along the panels spine (bigger surface area thus less weight per cm). If your cabinet will be sitting on a wood floor then even more definitely NOT. Look at what
@zozo did. He added two pieces of wood under each side else his floor would have deep markings.
2 beefy L brackets per corner 12" length down the side (10" on the top leaves room for the cross beam of the H, as describe above) -
https://www.amazon.ca/dp/B07HYCCSGT/
Definitely needed but also reinforcing from top to bottom with lumber wood on each side 4 sides.
Make a hole in the cabinet top for the canister tubing and use some sort of hole cover (there's 20cm total to work as the aquarium only takes up 60cm of the 80cm width) -
10cm each side if you place the aquarium on the center which I would recommend for even weight transfer. Personally I would make the hole on either lateral sides like on traditional tank cabinets.
Would it be a good idea to waterproof the top of the cabinet with something like varnish?
Since you are at it I would waterproof the whole cabinet not just the top.
Would this be sufficient reinforcement and stability?
Not sure because my little finger tells me that Ikea doesn't actually use a solid wood panel for the back. They usually use some 2/3mm MDF boards foldable in the middle. This allows the cabinet to be contained in a smaller package. This means you would also need to add a proper solid wood back to that cabinet.
Also I do own a few Ikea furniture made of solid pine wood (table, book shelves, coat hanger, Buddha stand) and let me tell you that although they are solid pine would you can actually mark the wood easily with your nail if you push a bit. Pine is a softwood. Needless to say what will happen when you put over 100Kg on it (water + tank + hardscape). Those Ikea cabinets can be woobly as well so maximum reinforcement is a must.
I would be you I would go down the
@zozo route. His cabinet is fantastic and it will last you an eternity. Plus it has the benefit of you being able to make the exact size you want and customize it as you see fit. Plus again since the pipes are the ones supporting the weight you can chose even very cheap wood to make the sides, back and front. It wouldn't matter in regards to the integrity of the cabinet. The top wood panel would probably the one that matters because it is where the tank is resting so it would need to be thick enough and durable. Final plus, it will probably be cheaper!