Best 20-Gallon Aquariums of 2025

The Ollie & Hutch Tank Stand is designed to support both 10-gallon and 20-gallon aquariums or terrariums, making it versatile for various pets and plants. Its stylish black oak finish adds a classic touch to your space. You'll appreciate the combination of open and hidden storage options, perfect for keeping your cleaning supplies and food neatly organized. Plus, the stand arrives flat-packed for easy shipping, and with two adults recommended for assembly, you’ll have it set up in no time. This sturdy stand can hold tanks weighing up to 240 lbs, ensuring stability for your aquatic or reptilian friends.

The Landen 45P Aquarium Tank is a versatile tank perfect for both freshwater and saltwater aquariums. Its compact design features an integrated filtration system that separates three filter spaces for easy maintenance and cleaning. The tank is made of all glass low iron ultra-clear glass with a beveled edge, and the glass joints are made by a high-quality German silica gel process. The water inlet is detachable and easy to clean, and the tank is designed with an EVA material foam leveling pad to reduce vibration and noise. The back filter chambers can be configured in multiple ways, allowing for DIY filter chamber design. The Landen BIOSMO 700 Return Pump is included, with a max flow rate of 700L/H and max head of 2.5M.

Get the Flipper 10/20 Gallon Aquarium Stand with open and concealed storage to hold all your aquarium equipment. The laminated MDF and particleboard construction, medium brown woodgrain finish, and unique patent design make it a classic-looking stand for your 10 or 20 gallon tank (not included). The stand can support tanks up to 240 lbs. and ships flat to your door. Assembly requires two adults.

Ultum Rimless Aquarium is an all-in-one 20-gallon tank that combines freshwater and saltwater functions. The triple-chamber filter system ensures clean water circulation with a sponge, bio-media, and a silent water pump. This versatile tank allows you to create diverse habitats for marine life and aquatic plants. The sleek design, made of 91% diamond glass, offers crystal-clear clarity. Crafted with precision-cut edges and low iron glass, this tank is perfect for DIY enthusiasts looking for aquatic elegance.

The JBJ Nano Aquarium is a sleek, all-in-one aquarium perfect for hobbyists. Crafted from high-quality glass, it includes an integrated sump and filtration media, simplifying the setup process. The clear glass design provides excellent visibility into the tank, enhancing the overall aesthetic. Available in various sizes, including 10, 15, and 20 gallons, this aquarium caters to different space requirements. With its user-friendly features, the JBJ Nano Aquarium offers a hassle-free experience for both beginners and experienced aquarists.

The Innovative Marine Fusion Aquarium is a versatile 20-gallon tank that offers a sleek design and user-friendly features. Made with low iron glass, it provides a clear view of your aquatic life while the beveled edges add an elegant touch. Enjoy peace of mind with the pre-assembled SafeScreen mesh lid that protects your fish while allowing easy access. The built-in acrylic overflow wall ensures efficient filtration, making it easier for you to maintain water quality. With the included magnetic glass cleaner, keeping the tank clean becomes a breeze, allowing you to focus more on enjoying your aquarium.

The Midwest Tropical 20 Gallon Aquarium is a unique floor aquarium that enhances your interior with stunning panoramic seascapes. This design not only adds beauty to your space but also creates a calming atmosphere. It comes fully equipped with essential components, including a pump and lighting, making setup a breeze. You will appreciate the included decorative plants that bring life to the aquarium, while the under-gravel filtration and air pump ensure a healthy environment for your aquatic friends. This kit provides everything you need to enjoy a vibrant underwater world right in your home.

The Innovative Marine Fusion Pro 2 20 Gallon AIO Aquarium is a sleek tank package with a built-in acrylic overflow wall for efficient filtration. The pre-assembled SafeScreen Mesh Screen Lid ensures the safety of your aquatic pets. With the included Micromag Magnetic Glass Cleaner, maintenance is a breeze. The tank's low iron glass construction with beveled edges enhances visibility and aesthetics, providing a stunning display for your underwater world.

The I Heart Geckos Conversion Kit is an excellent solution for transforming a 20-gallon long aquarium into a gecko-friendly habitat. This kit allows you to repurpose your existing tank, saving you money while creating a suitable environment for your pet. Before purchasing, it's important to measure your tank's opening to ensure a proper fit, as the dimensions are 11 5/16 inches wide by 29 3/16 inches tall. Please note that the tank itself is not included, so you'll need to have one on hand. With this conversion kit, you can easily enhance your pet's living space.