We Use CookiesWe use cookies to enhance the security, performance, functionality and for analytical and promotional activities. By continuing to browse this site you are agreeing to our privacy policy

10 Best Fish Tanks 2025 in the UK

How do we rank products for you?

Our technology thoroughly searches through the online shopping world, reviewing hundreds of sites. We then process and analyze this information, updating in real-time to bring you the latest top-rated products. This way, you always get the best and most current options available.

headphones-stars

Our Top Picks

#1

Winner

MonsterShop Large Fish Tank White 4ft 300L 65 Gal Aquarium Marine Tropical Saltwater Freshwater. White Cabinet Storage Stand. Complete Starter Kit, Filter, Air Pump, Heater, LED Light…

Rating
9.9
Chosen by1,332
Size
Material
Filtration System
Size
Handling this tank requires careful planning due to its heavy weight, but once set up, it provides a spacious and enjoyable environment for fish.
Material
This aquarium stands the test of time with its sturdy cabinet and durable glass, making it a reliable choice for long-term use.
Filtration System
The built-in features are great for beginners, but upgrading the filter system can enhance performance as you become more experienced.

The MonsterShop Large Fish Tank is a substantial 300-liter aquarium suitable for various fish types, whether freshwater, marine, or tropical. The tank's white color with walnut trim offers a stylish look that can complement most indoor settings. Constructed from sturdy 11mm thick curved glass, it ensures durability and provides clear views of your aquatic pets. The integrated cabinet stand is a practical feature, offering ample storage for aquarium supplies and accessories.

One of the tank’s notable strengths is its comprehensive starter kit, which includes built-in filtration, an air pump, and LED lighting. These features simplify initial setup, making it convenient for beginners. Additionally, the 300W adjustable heater is perfect for maintaining suitable water temperatures, essential for tropical fish.

Despite these strengths, the tank's large size means it takes up significant space, which may not be ideal for smaller rooms or apartments. At 100 kilograms, it is also quite heavy, requiring careful planning for assembly and placement. Potential buyers should consider whether they have the necessary room and support to accommodate such a big tank.

In terms of versatility, the tank is suitable for housing various kinds of fish, making it an attractive option for enthusiasts wanting to explore different aquatic environments without multiple setups. However, those seeking more customized or specialized setups might find the built-in features limiting. This fish tank is a robust option for hobbyists looking to manage a substantial and varied aquatic environment. With its all-inclusive features, it provides both convenience and efficiency, but the size and weight may require additional considerations.

Rating
9.9
Chosen by1,332
Size
Material
Filtration System
Size
Handling this tank requires careful planning due to its heavy weight, but once set up, it provides a spacious and enjoyable environment for fish.
Material
This aquarium stands the test of time with its sturdy cabinet and durable glass, making it a reliable choice for long-term use.
Filtration System
The built-in features are great for beginners, but upgrading the filter system can enhance performance as you become more experienced.
#3

Diversa AQUARIUM WITH LID AND STAND/CABINET Professional Fish Tank - Real Glass, Standard Rectangle (160 Litre Set)

Rating
9.8
Size
Lighting
Size
The aquarium's size is just right, offering plenty of room for aquatic pets, making it ideal for species like axolotls.
Lighting
The quality of the tank and lighting is impressive, with the LED light providing excellent brightness.

The Diversa Aquarium with Lid and Stand is a well-rounded option for those serious about setting up a reliable and stylish fish tank. With a generous 160-litre capacity, this aquarium is crafted from Float Guardian Glass, which ensures both durability and excellent clarity for viewing your aquatic life. The glass thickness of 6 mm adds an extra layer of safety, making it sturdy and secure, which is crucial for protecting your aquatic pets.

The inclusion of a 20W LED light is a strong point, providing 2550 lumens of brightness at 6500K, ideal for promoting vibrant plant life and creating a natural ambiance. Its energy efficiency, rated at A+, means it won’t inflate your electricity bill, which is a nice touch for continuous, worry-free operation. The aquarium comes with a well-designed stand, complementing its minimalist style and ensuring stability. This is a great addition for those wanting to seamlessly integrate the tank into their home decor. Additionally, the free aquarium mat is a thoughtful inclusion, helping to protect surfaces and further stabilize the tank.

However, it's worth noting that the aquarium does not come with a filtration or heating system. These are crucial components for maintaining a healthy environment for fish, so you will need to invest in these separately. This could be an additional expense and requires some research to ensure compatibility with the tank's size. Weighing in at 50 kg, it’s relatively heavy, which might pose challenges during setup or relocation. But once in place, its weight contributes to its stability. Despite the lack of filtration and heating, it's best suited for those prepared to finalize their setup with additional equipment.

Rating
9.8
Size
Lighting
Size
The aquarium's size is just right, offering plenty of room for aquatic pets, making it ideal for species like axolotls.
Lighting
The quality of the tank and lighting is impressive, with the LED light providing excellent brightness.

Buying Guide for the Best Fish Tanks

Choosing the right fish tank is essential for the health and happiness of your aquatic pets. There are several factors to consider, including the size, material, filtration system, and lighting. Understanding these key specifications will help you make an informed decision that suits your needs and ensures a thriving environment for your fish.
SizeThe size of the fish tank is crucial because it determines how many fish you can keep and how comfortable they will be. Fish tanks come in various sizes, from small desktop aquariums to large tanks that can hold hundreds of gallons. Smaller tanks (under 20 gallons) are suitable for beginners or those with limited space, but they require more frequent maintenance. Medium tanks (20-50 gallons) offer a balance between ease of maintenance and space for fish. Large tanks (over 50 gallons) provide ample room for a diverse range of fish and plants but require more space and investment. Consider the number and type of fish you want to keep, as well as the space available in your home, when choosing the size.
MaterialFish tanks are typically made from glass or acrylic. Glass tanks are more scratch-resistant and provide clearer viewing, but they are heavier and can be more fragile. Acrylic tanks are lighter and more durable, making them easier to move and less likely to break, but they can scratch more easily. If you plan to move the tank frequently or have children who might bump into it, an acrylic tank might be a better choice. For a permanent setup with a clear view, glass is often preferred.
Filtration SystemA good filtration system is essential for maintaining water quality and keeping your fish healthy. There are three main types of filtration: mechanical, biological, and chemical. Mechanical filters remove debris, biological filters break down waste using beneficial bacteria, and chemical filters remove toxins. For small tanks, a simple hang-on-back filter might suffice. For larger tanks, a canister filter or sump system provides more thorough filtration. Consider the type and number of fish you have, as some species produce more waste and require more robust filtration.
LightingProper lighting is important for the health of your fish and any live plants in the tank. Fish tanks can be equipped with fluorescent, LED, or incandescent lights. LED lights are energy-efficient and provide a range of colors and intensities, making them a popular choice. Fluorescent lights are good for plant growth but can be less visually appealing. Incandescent lights are less common due to their heat output and energy consumption. If you have live plants, choose lighting that supports plant growth. For fish-only tanks, focus on lighting that enhances the appearance of your fish.
HeatingMaintaining the right temperature is vital for the health of your fish. Most tropical fish require a stable temperature between 75-80°F, while cold-water fish like goldfish prefer cooler temperatures. Heaters come in various types, including submersible and in-line heaters. Submersible heaters are placed inside the tank and are easy to install, while in-line heaters are connected to the filtration system and provide more consistent heating. Choose a heater based on the type of fish you have and the size of your tank.
Decorations and SubstrateDecorations and substrate (the material at the bottom of the tank) are not just for aesthetics; they also provide hiding places and breeding grounds for fish. Substrate can be gravel, sand, or specialized plant soil. Gravel is easy to clean and comes in various colors, while sand is more natural but can be harder to clean. Plant soil is ideal for tanks with live plants. Decorations like rocks, driftwood, and artificial plants create a stimulating environment for fish. Choose decorations and substrate based on the needs of your fish and the look you want to achieve.