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Large Fish Tanks and Aquariums

Although large aquariums can be beautiful, these big fish tanks aren’t just for show. They also provide a healthier environment for your fish, coral, and other underwater plants. Even if you don't currently have many fish, large aquariums offer you the option to add more when you're ready. No matter who’s living in your aquarium, it’s important to make sure that someone is committed to cleaning and feeding its inhabitants. Big fish tanks will require different equipment depending on what plants and animals live inside. For example, large saltwater aquariums with coral will need appropriate lighting and powerheads to simulate an ocean environment.

FAQs About Aquariums, Tanks & Bowls

No fish tank is “too big” as long as the location of your tank can hold its weight. For fish that enjoy small spaces, add live or artificial plants, driftwood, rocks and caves, or other decor to fill some space.

The best fish tank can vary by the size, type, and amount of fish you plan on placing in the habitat. You may think as a beginner smaller is better, but larger tanks may be easier to maintain as they are less susceptible to changes in water chemistry.

Aquariums can range in size from a quarter gallon tank to over 100 gallons. You can purchase an aquarium in any size you could think of, but it may have to be custom made. At Petco, we offer aquariums up to 10 gallons, 20 to 39 gallons, and 40 gallons and larger.

The best tank for a beginner will vary depending on the size, type, and amount of fish you plan on having in your tank. You may think smaller is better but that’s not always the case. Bigger tanks may be easier to maintain as there is less room for errors and they are less susceptible to changes in water chemistry. Check out our aquatics checklist and learn what you’ll need to start your own aquarium.