Fish Tanks & Aquariums | PetSmart

Beginners are usually recommended to get starting with the best 20 gallon fish tank or aquarium kit with filter and LED lighting. With this tank size, the water quality doesn’t change too fast to poison the fish making it an ideal choice for starters, who don’t have much experience in solving aquarium problems. 20 gallon aquariums are available in various shapes and materials for you to choose. It can be a standard (high) or long, rectangle or half-moon shaped, and glass or acrylic tank.

Best filters for 20 gallon fish tanks (power, canister, internal filters)

SeaClear is a famous brand for its acrylic tanks that usually come in various size from 20 to over 50 gallons. SeaClear 20 gallon acrylic aquarium is made of clear acrylic with a durable construction and is a great choice for starters who love the clarity and beauty of acrylic fish tanks.

Aqueon® 20 Gallon Hex Aquarium Starter Kit.

The 20 gallon fish tank is one of the most popular fish tanks on our website. Not many people realize this but there are a few different 20 gallon fish tank sizes. Description I have a 20 gallon fish tank and modern looking wood stand for sale - it comes with the gravel, large bubbler, pump, heater, filter, hood, light, and digital thermometer. The tank also comes with live plants and the fish which consist of several angel fish, a gourami, 2 pink glofish, an algae eater, a bottom feeder (catfish), and several other random fish. Asking $100 OBO, negotiable on the price or open to trades for anything I'm interested in because I am moving and can't take all my tanks with me so a couple have to go. I will take out 3/4 of the water and take the fish out so you can bring a container to put them in to transport them. Please feel free to text with any questions or to make an offer [TL_HIDDEN] .

Best 20 gallon aquarium kit and fish tank for sale reviews

While 20-gallon tanks are recommended for beginners who want to start with some tropical fish, are ideal choice for Betta lovers. Although a can work well for one male Betta, a 5 gallon one will provide your Betta and his tank mates a larger house to live happily and healthily. As you known, Bettas that have adequate space and enough exercise will live a longer and happier life. So, I strongly recommend the Marina LED 5 gallon aquarium kit for any Betta fish lovers.

Product - Aqua Culture LED Aquarium Hood for 20/55 Gallon Aquariums


The 20 gallon fish tank is one of the most popular fish tanks on our website. Not many people realize this but there are a few different 20 gallon fish tank sizes. This article describes all of the 20 gallon fish tank types and gives a review on the standard 20 gallon aquarium.“The bigger the aquarium, the easier maintaining it will be.” This is probably the single most important rule in the hobby, and for someone setting up their first aquarium, it is an absolutely essential fact of life. The size of the aquarium has a direct impact on several key physical and chemical processes, including pH stability, thermal stability, and the dilution of metabolic wastes such as ammonia. The smaller the tank, the less stable and the more toxic the environment is likely to be.

The size of the aquarium is also important in terms of how fish behave. Schooling fish need to be kept in groups of at least five or six specimens, and that it turn requires a certain amount of aquarium volume and swimming space. When kept in insufficient numbers, barbs, danios and tetras become frustrated and often turn aggressive or nippy. Territorial fish need to be able to claim a certain patch of ground, and if there isn’t enough space in the tank, fighting or bullying can occur. Livebearers pose a particular set of problems because of the way males fight with each other while also tending to bully the females. It is important that there is enough space for the male and female livebearers to spread out, and if necessary find hiding places where they can rest or give birth safely.
For all practical purposes, the minimum “safe” aquarium size is 20 US gallons (75 litres). Such a tank will be big enough to accommodate a reasonable selection of small aquarium fish without being particularly large or expensive. More ambitious aquarists interested in big or territorial species such as cichlids should consider larger systems though, with tanks up to 55 US gallons (210 litres) in size providing a good balance between size and expense.