Best Rectangular Aquariums of 2026

The Tetra Glass Aquarium 29 Gallons is a rectangular fish tank made of glass that provides an ideal home for your fish. The aquarium allows easy customization with assorted Tetra accessories (sold separately) to make it your own. You can mix and match with your favorite Tetra filtration, lighting, and water care products (sold separately). The aquarium measures 30 inches wide by 12 inches deep by 18 inches high, providing ample space for your aquatic friends. The Tetra brand is dedicated to helping both seasoned hobbyists and beginners have a lifelong aquatic experience.

The Tetra Glass Aquarium is a rectangular fish tank that provides an ideal home for your fish. With a capacity of 5.5 gallons, it offers enough space for your aquatic pets to swim and play. One of the great features of this aquarium is the ability to customize it according to your preferences. You can mix and match with your favorite Tetra filtration, lighting, and water care products to create the perfect environment for your fish. Additionally, the Tetra Glass Aquarium is made of glass, ensuring durability and visibility. Whether you are a seasoned hobbyist or a beginner, this aquarium will help you enjoy a successful and lifelong aquatic experience.

The Tetra Glass Aquarium 55 Gallons is a rectangular fish tank made of glass, perfect for creating a home for your fish. It measures 48 inches wide by 13 inches deep by 20 inches high and is compatible with a variety of Tetra filtration, lighting and water care products. Customers have praised the tank for its good condition and being easy to lift, though some have experienced issues with the silicone and support bar.

The AQUANEAT Small Betta Fish Tank is perfect for beginners or kids. The built-in LED light makes your fish and decorations look vibrant. Its compact size fits well on any desktop. The water filtration system reduces the need for frequent water changes, keeping your Betta, shrimp, snails, or goldfish happy. Remember to use a pre-filter sponge if the water flow is too strong. This starter kit includes everything you need to get started.

LYPHARD 15 Gallon Rimless Aquarium is a high-quality fish tank made of ultra-white glass material with superior transparency. With its exceptionally high light transmittance rate of 91.5%, you can enjoy a clear view of your fish. The strong structure of this tank ensures no water leakage and can withstand high water pressure with a large water volume. It comes with dimensions of L19.7" x W13" x H13.8" and a thickness of 6mm, making it suitable for various types of fish and aquatic plants. LYPHARD AQUARIUMS also offers additional equipment such as submersible pumps and air pumps to fulfill all your aquatic needs.

The VEVOR PVC Fish Pond offers a durable and practical solution for your aquaculture needs. Its thick 0.9 mm PVC material is tough and resistant to corrosion, sunlight, and scratches, so you can trust it to last and protect your aquatic life. The strong stainless steel frame keeps the pond stable and maintains its shape even when filled, giving you peace of mind about its sturdiness. With a large drainage valve, you can easily and quickly empty the pond, making cleaning and maintenance hassle-free. Plus, its spacious 127-gallon capacity provides plenty of room for your fish or other aquatic creatures, whether indoors or outdoors.

The Geelin Mini Plastic Aquarium is a compact and versatile tank perfect for your home or office. Its small size fits easily on desks and countertops, holding up to 2 gallons of water, so you can move it around wherever you like. Made from durable plastic, this tank is resistant to breaking if accidentally dropped, ensuring your aquatic pets or plants stay safe. Plus, its clear design gives you a great view of your bettas, shrimp, or even succulents. Beyond fish, you can get creative by using it as a unique display for plants or small creatures, making it a fun and practical addition to your space.

The Pawfly Rimless Aquarium offers a stunning 5-gallon tank designed for clear visibility of your aquatic life. Its full-spectrum lighting features adjustable brightness and a timer, ensuring your fish enjoy a natural day and night cycle. The integrated triple filtration system keeps your water clean and fresh, making maintenance a breeze. Plus, the magnetic glass cleaner helps you easily remove stubborn stains and dust, keeping your tank crystal clear. This aquarium kit is perfect for creating a vibrant habitat for your fish and plants while being easy to care for.

The Tlence Small Glass Aquarium is a compact tank perfect for small fish, shrimp, or aquatic plants, holding around 2.5 to 2.7 gallons of water. Its size makes it ideal for places with limited space, like desks or apartments. Made from clear, high-quality glass, it offers you a bright and scratch-free view of your aquatic pets. The tank’s thick, strong glass and precise construction prevent leaks and cracks, ensuring a safe environment for your fish. Plus, its simple rectangular design means you can easily add filters, heaters, or other accessories, and cleaning it is hassle-free, helping you keep your fish comfortable and healthy.

The RED TAIL FISH Rimless Aquarium offers a crystal-clear view thanks to its low-iron glass, which ensures no color distortion so you can enjoy the vibrant colors of your fish. Its 5-gallon size is perfect for small aquatic setups, fitting comfortably in most spaces. The rimless design gives you an unobstructed, modern look and makes it easy to access the tank for cleaning or adjusting lighting. Built with thick, 5mm glass and smooth, polished edges, this tank is crafted for durability and a sleek finish, providing both strength and style for your aquarium experience.