Aquariums & Stands

Start with the tank, because every other purchase is sized to it. A 20-gallon (75-liter) or larger tank gives beginners far more room for error than a nano tank, and its stand must be rated for the filled weight. Skip bowls: they are too small to filter or heat.

This page sorts tanks by size and style: starter kits, rimless and nano tanks, stands built for the weight, breeding tanks, and why we steer people away from bowls. Tank sizes are in US gallons with liters alongside; a UK gallon holds about a fifth more.

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Starter Tank Kits by Gallon Size

A starter kit packs a tank, a lid and usually a filter and light in one box, with parts matched to each other. Most beginners do best with a 20-gallon (75-liter) kit rather than the smallest on the shelf. A 10-gallon (38-liter) kit suits a single betta or a small shrimp colony; a 5-gallon (19-liter) tank suits only the simplest setups and forgives almost nothing; a 55-gallon (208-liter) tank holds a real community without being outgrown.

Rimless, Bowfront & Nano Tanks

Rimless tanks have clean glass edges with no plastic frame, popular for planted and aquascaped tanks. A bowfront curves the front panel for a wider view. A nano tank, usually under 10 gallons (38 liters), suits a betta, shrimp or a tiny community, but its small volume punishes mistakes faster than a larger tank.

Aquarium Stands Built for the Weight

Water is heavy: each liter weighs a kilogram, so a 20-gallon (75-liter) tank holds about 165 lb (75 kg) of water before glass, gravel and rock, and a 55-gallon (208-liter) tank about 460 lb (208 kg). Use a stand made and rated for your tank size, on a level, solid floor, not ordinary furniture. A stand failure risks the tank and everything in it, plus your floor.

Breeding Tanks

A breeding tank keeps eggs and fry away from adult fish that would eat them. It is usually small and simple: a bare bottom, a gentle sponge filter that won't suck in fry, and dense plants or a spawning mop for eggs. Once fry are big enough, they move to a grow-out tank or back to the main tank.

Skip the Bowl: Why We Don't Recommend Them

A bowl looks charming but holds too little water for a steady temperature or water quality, and almost never has a filter, so waste builds up fast. Bettas are marketed toward bowls more than any other fish, yet they suffer in them too. A heated, filtered tank of at least 5 gallons (20 liters) costs little more and gives a betta a real home; see betta tanks done right.

Kit vs Piece-by-Piece Setups

A kit saves you matching tank, filter and light, which is worth a lot for a first aquarium. Buying piece by piece gives more control over filter type, lighting and stand style, which matters more once you know what a planted tank, breeding setup or species display needs. Many keepers start with a kit and buy separately for their second tank.

Frequently asked questions

Shoppers weighing tank and stand options tend to ask these next.

What size tank should a total beginner start with?

A 20-gallon (75-liter) or larger tank. More water buffers waste and temperature swings, giving you time to spot and fix mistakes.

Are fish bowls ever an acceptable home for a fish?

No. A bowl lacks the filtration and water volume any fish needs to stay healthy long term. A small heated, filtered tank is the better choice even for one betta.

Does a stand need to be purpose-built for the tank?

Yes. A filled tank is far heavier than it looks, and a stand rated for that weight and sized to the tank's footprint is much safer than ordinary furniture.