Aqueon 20 to 39 Gallon Fish Tanks

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Related Articles & Questions

Home & Habitat
Your First Fish Tank: Easy Setup Guide for a Thriving Aquarium
Everything you need to know about how to start a fish tank. Learn about setting up an aquarium, choosing the right type, and acclimating new fish to your tank.
Updated on November 13th, 2025
New Pet
Complete Tetra Care: Tank Setup, Food, & Compatibility Tips
Learn how to care for a Tetra, recommended diet & habitat setup. Find the right food, supplies & equipment at your neighborhood Petco.
Updated on November 13th, 2025
New Pet
Master Small Marine Fish Care: Tank Setup, Food, & Compatibility Guide
Small Marine Fish are favorites with marine aquarists and includes a wide range of species.
Updated on November 13th, 2025
New Pet
Arowana Care: Tank, Food, Health for a Thriving Predatory Jumper
Arowana are large and often aggressive with the potential of rapid growth. Learn how to care for Arowana, what to feed them, tank size, and more.
Updated on November 13th, 2025
New Pet
Mastering Koi Care: Optimal Tank, Food, Water Quality & Health Tips
Learn how to care for a Koi, recommended diet and aquarium setup. Find Koi for sale, supplies and equipment at your neighborhood Petco.
Updated on November 13th, 2025
Health & Wellbeing
I have a 20 gallon tank. I'm thinking of buying +5 fish. Which fish could I buy and what would I need for the fish and tank?
A fish tank will need a filter, a light/hood and a heater. Make sure the filter is rated for at least twice the tank volume. The heater should be adjustable since water temperature will depend on the species of fish. Good "starter" fish include Tetras, Mollies, Danios or Tetras. A new tank should be set up and left running empty for several weeks before adding fish. A pinch of flake food can be sprinkled in daily. This "cycling" will allow a population of beneficial bacteria to colonize the tank and filter. These bacteria will break down wastes (ammonia, nitrites and nitrates) which are toxic to fish.
Updated on August 12th, 2025
Health & Wellbeing
I'm doing a project for school about fish and here are some questions I have: What kind of fish is easiest to take care of? What size tank should someone start out with? What are some things people don't know about fish? What are the most common reas
Guppies or Neons are excellent "starter" fish. Care is simple and they are inexpensive. A standard 10 gallon tank is recommended to start. Most people don' t realize the amount of "work" needed to maintain a tank. Filter maintenance, monitoring water chemistry, water changes, monitoring fish health and providing a balanced diet are just a few items that need regular attention to keep a tank thriving. Even though fish aren't as cuddly as cats and dogs, they do have their own personalities and even respond to their owners, especially at feeding time! Studies have shown that simply watching fish in a tank can lead to a reduction in both heart rate and blood pressure. It is quite relaxing.
Updated on August 12th, 2025
Health & Wellbeing
I was wondering if my tank is big enough for them to be happy. The tank is currently 90L. Thanks!
Thank you for using Boop by Petco! It looks like the tank provides enough room for Speedy and Explorer to swim comfortably. Keep an eye on them, and move them into a larger tank if they get significantly larger or you notice signs of fighting or increasing ammonia levels in the tank.
Updated on August 12th, 2025
Health & Wellbeing
I got some new fish yesterday but I am not sure what type they are as they were s gift. They are black and a bit small. I want to know what type of fish they are and what they would need. Can you please help me with what type pf fish they are and wha
As for what kind of tank you will need: Basically a square fish tank, do not get a bowl. You will likely need a heater and an air pump, and a thermometer, It is easiest to by a complete kit at a pet shop. As for size of tank: The bigger is always the better....however a minimum size will be determined by the type of fish and their average size they will grow into, So once we know what type of fish you have and how many, we can tell you how big your tank needs to be and what type of "furniture" (rocks, plants, gravel) you will need.
Updated on August 12th, 2025
Health & Wellbeing
Hi I currently have 2 young goldfish, 1 Young zebra danio, and one black mystery snail! I own a 5.5 gallon tNk for my current fish and I know it isn’t big enough since I know hat goldfish can grow to a large size. What would be a suggested size gallo
The goldfish can get very big and may require a significantly larger tank as they grow and grow. As a rule of thumb, you need 1 gallon of water per inch of body length of fish. So if you have three 1 inch fish, you will need 3 gallons of water. I suspect you are at your max already in the smaller tank. Just so you know, most people do not have goldfish in tanks with tropical fish. You may consider getting two tanks One for your cold water fish like the goldfish, and one for your tropical fish that require a warm water temperature. For the goldfish I would suggest a minimum of a 20 gallon tank. For the Danio, I suggest to get a few more of these as they are schooling fish and a 10 gallon would be just fine. I hope this is helpful and please feel free to post any additional questions.
Updated on August 12th, 2025