4ft / 120cm Aquariums & Fish Tanks

Shop 4ft and 120cm aquariums for freshwater fish, planted tanks, aquascaping and feature displays at Aquaholics. A 4ft aquarium offers generous swimming room and provides plenty of space for creating larger community tanks, planted aquariums and impressive freshwater aquascapes.

Our range includes traditional glass fish tanks, premium low-iron glass aquariums and complete aquarium and cabinet systems. Sunshine Coast customers can also visit Aquaholics in Baringa for help choosing an aquarium and the filtration, lighting, heating and other equipment needed to complete their setup.

Why Choose a 4ft Aquarium?

A 4ft aquarium generally refers to a fish tank around 120cm long. The exact width, height and water capacity can vary significantly between models, so always check the specifications of the individual aquarium.

The additional length and water volume of a 120cm aquarium provide greater flexibility when planning livestock, planting and aquascaping. A well-planned 4ft aquarium can become an impressive feature in a home, office or dedicated fish room while providing more usable swimming space than smaller aquarium sizes.

Fish should always be selected according to their adult size, activity level, social requirements and the actual dimensions and capacity of the aquarium.

Glass & Low-Iron 120cm Aquariums

Aquaholics stocks different styles of 4ft aquarium, including traditional glass fish tanks and premium low-iron glass systems.

Traditional Glass Aquariums

Standard glass aquariums are a durable and practical choice for freshwater fishkeeping. They are highly resistant to scratching and work well for community tanks, planted aquariums and larger freshwater displays.

Low-Iron Glass Aquariums

Low-iron glass contains less iron than conventional aquarium glass, reducing the green tint that can be visible through thicker glass panels. This improved clarity can make fish colours, plants and aquascaping details appear more natural and is particularly attractive in larger display aquariums.

Complete 4ft Aquarium Setups

A complete 4ft aquarium system can simplify the process of planning a larger tank. Depending on the model, complete systems may include the aquarium, matching cabinet, LED lighting, filtration or sump components and other equipment.

Always check the individual product description to confirm exactly what is included, as complete aquarium systems vary between brands and models.

If you're looking for a particular 4ft or similarly sized aquarium and cabinet combination that isn't currently displayed online, Aquaholics can also check ordering options from leading aquarium brands including Aquael, OASE and Bioscape, subject to current model availability.

4ft Aquariums for Planted Tanks & Aquascaping

A 120cm aquarium provides excellent proportions for larger freshwater aquascapes. The extra horizontal space allows you to create more complex layouts using aquarium rock, wood and live plants while maintaining open swimming areas and a strong sense of depth.

Planted 4ft aquariums can range from lower-maintenance natural displays through to advanced aquascapes. Lighting, substrate, fertilisation and CO2 requirements should be selected according to the plants you intend to grow and the style of aquarium you want to create.

Explore our aquascaping supplies for aquarium rock, wood, tools, planted substrates and other products for building your 120cm aquascape.

Choosing Equipment for a 4ft Aquarium

A larger aquarium requires equipment that is properly matched to its actual water volume and livestock load. Two tanks that are both approximately 120cm long can have very different capacities depending on their width and height.

• Aquarium filtration – choose filtration with sufficient capacity and flow for the aquarium volume and intended livestock.
• 120cm aquarium LED lighting – browse lighting options specifically suited to 4ft aquariums, fish displays and planted tanks.
• Aquarium heaters – select heating according to the tank's actual water volume and required temperature.
• Aquarium substrate, gravel and sand – choose decorative or planted substrates for freshwater displays and aquascapes.
• Live aquarium plants – create natural planted displays and larger freshwater aquascapes.

What Fish Can Live in a 4ft Aquarium?

A 4ft aquarium can provide suitable space for a wide range of freshwater fish when appropriately stocked. The additional swimming length makes this size useful for many community setups and selected larger or more active freshwater species.

However, aquarium length alone should never determine stocking suitability. Adult size, swimming behaviour, social group requirements, territorial behaviour, filtration capacity and the aquarium's actual dimensions must all be considered.

Once your aquarium is established and fully cycled, explore our range of live aquarium fish for your freshwater setup.

Setting Up a 120cm Aquarium

A 4ft aquarium can become extremely heavy once filled with water, substrate, rock, wood and equipment. Position the aquarium on a strong, level cabinet or appropriately engineered stand capable of supporting its complete filled weight.

Install your filtration, heating and lighting, add substrate and hardscape, then fill the aquarium using appropriately conditioned water. Before adding fish, allow the aquarium to establish a functioning biological filter through the cycling process.

4ft Aquariums on the Sunshine Coast

Looking for a 4ft aquarium or 120cm fish tank on the Sunshine Coast? Aquaholics Aquarium Supplies is located in Baringa, where local customers can get help selecting an aquarium, cabinet, filtration, lighting, heating and other equipment for a complete freshwater setup.

We can also check availability for selected complete aquarium and cabinet systems from brands including Aquael, OASE and Bioscape if you're looking for a particular model or configuration that isn't currently displayed online.

Looking for another aquarium size? Browse our full range of aquarium fish tanks and complete aquarium kits, or explore our 2ft aquariums, 3ft aquariums, 5ft aquariums and 6ft aquariums.

Frequently Asked Questions

How big is a 4ft aquarium?

A 4ft aquarium is generally around 120cm long. Width, height and total water capacity vary between aquarium models, so always check the individual specifications before selecting equipment or livestock.

How many litres is a 4ft fish tank?

There is no single capacity for a 4ft aquarium. Tanks around 120cm long can vary substantially in width and height, which changes their total volume. Use the stated capacity of the individual aquarium when choosing filtration, heating and livestock.

Is a 4ft aquarium suitable for beginners?

Yes. A 4ft aquarium can be an excellent option for beginners who have the available space and suitable support. The larger water volume can provide greater stability than smaller aquariums, although larger tanks also require appropriately sized equipment and regular maintenance.

Is a 4ft aquarium good for aquascaping?

Yes. A 120cm aquarium provides generous horizontal space for planted aquascapes using live plants, aquarium rock, wood and substrate. The additional length allows more freedom when creating depth, focal points and open swimming areas.

Do I need a cabinet for a 4ft aquarium?

A 4ft aquarium should sit on a strong, stable and level surface capable of safely supporting its complete filled weight. A purpose-built aquarium cabinet or appropriately engineered stand is strongly recommended.

Can Aquaholics order a complete 4ft aquarium setup?

Yes. In addition to the 4ft aquarium systems available through our website, Aquaholics can check ordering options for selected aquarium and cabinet combinations from brands including Aquael, OASE and Bioscape, subject to current availability.

Can I buy a 4ft aquarium on the Sunshine Coast?

Yes. Aquaholics Aquarium Supplies is located in Baringa on the Sunshine Coast and stocks 4ft aquariums, complete systems and equipment for freshwater, planted and aquascaped tanks.