A 120 cm aquarium provides space for larger aquascapes, larger fish and more sophisticated hardscapes. It is also a size where driftwood can make a real impact without the aquarium feeling overcrowded.
But the same principle still applies: don’t just choose the largest root that will fit. Choose the root that will improve the aquarium.
A large main root
If you want to design the aquarium around a prominent main root, a root measuring around 75–105 cm is often a good starting point. In some cases, even larger roots can work, particularly if the aquarium is deep and the root is airy.
A sturdy driftwood piece can create the impression of an old beach, a fallen tree trunk or a natural underwater environment. However, it should not block the entire swimming area. In a 120 cm aquarium, it often looks lovely when the driftwood is allowed to take up some space without filling the whole tank.
Multiple roots create a more natural look
In larger aquariums, several roots together often look even better than a single root. Two or three roots can create direction, depth and variety. A sturdier root can be placed in the foreground, whilst thinner or more branched roots extend towards the background.
As a rough guide, roots measuring 50–80 cm can work well in groups, depending on their shape. The important thing is that they look as though they belong together. Similar colour, a similar texture and a natural orientation make a big difference.
Think of the fish
Many 120 cm aquariums contain fish that need swimming space. Discus, angelfish, larger tetras, cichlids or larger catfish need to be able to move about. A beautiful piece of driftwood can be a problem if it creates a cramped maze where the fish cannot fit.
You should therefore plan for an open space right from the start. The roots can frame the space, create shade or provide a dark backdrop without getting in the way.
Height and depth are crucial
In a large aquarium, people often focus on the length, but the depth and height determine how the driftwood is perceived. A piece of driftwood measuring 90 cm may be perfect if it is low-lying and follows the substrate. Another piece measuring 70 cm may be too large if it is very tall and juts out towards the glass.
That is why product images and measurements are so important together. A WYSIWYG root should be assessed as an object in a room, not just as a measurement in centimetres.
When XXL roots become interesting
In a 120 cm aquarium, really large Tuskwood roots start to make a real difference. XXL pieces can convey a sense that smaller roots cannot: weight, age and a strong natural presence.
But balance is key here too. A large root can look fantastic if it leaves the right amount of open space. It can also be too much if it fills the entire pot without any sense of direction.
In short
For a 120 cm aquarium, a single prominent main root is often around 75–105 cm long, whilst several roots of around 50–80 cm can create a more natural and depth-filled aquascape.
Choose according to role, shape, height, depth and surface area. Tuskwood is particularly well suited to larger aquariums as each root is unique and there are both sturdy and simple, branched and a wider range of sculptural designs to choose from.