Skip to main content
  1. Home
  2. Other animals
  3. Evergreens

A complete guide to aquarium essentials for first-time fish owners

Add as a preferred source on Google

You’re ready to dive into your first aquarium, but where do you start? Owning freshwater fish might seem easier than keeping other pets, but it still requires prep work and care. For starters, always purchase your tank, food, and equipment before heading into the pet store to pick up your new fish. This way, you’ll have everything ready to go (and the opportunity to troubleshoot any surprise problems). By setting yourself up in advance with aquarium essentials, you’ll conquer pet ownership with ease. 

Little girl feeds fish in her aquarium
Anatoly Tiplyashin/Shutterstock

What do I need to know before buying a fish tank?

Before you even purchase a tank, you’ll need to make a few key decisions — mainly which fish you get and how many. Getting too small a tank can hurt your fish and make it a lot harder to keep the environment clean. Some fish prefer to live together, like tetras, and others need to be alone, like bettas. Certain species might do fine together in theory but have vastly different temperature or lighting requirements, making it impractical to keep them in one tank.

Recommended Videos

We recommend true novices begin with a 20-gallon tank. While a couple of small fish can certainly live in a 10-gallon, it can actually be harder to maintain since it will get dirty faster. Remember, some of the worst offenders for your fish’s health are invisible to you, like ammonia and nitrates.

What else should I buy?

Your tank is just the beginning. Once you’ve selected the right size and have a good idea what types of fish you’ll be keeping, it’s time to look into accessories. Some of these are essentials and others are just fun. Start with a filter and other must-haves like a light or heating pad. Different species need different setups, and you’ll need to carefully pick instruments that fit your aquarium and space. While a solitary goldfish or betta might do all right without a filter, you’ll almost certainly need one for a larger group. If you’re adding a light source, a timer can make it easier on you, so you don’t need to remember one more light to turn off each day.

Next, you should grab fish food and other additives like aquarium conditioner, which helps keep the nutrients and chemicals in sync. A water-quality testing kit will be beneficial as well. Even with a filter, you’ll need to regularly wipe down some parts of the tank by hand and will want to deep-clean occasionally. Add pet-safe cleaning supplies to your list so you’re prepared when the time comes. Don’t forget replacement parts, a fish net, and fish medicine.

Last, but certainly not least, you get to pick out your decorations. Begin with the floor of your tank, which will probably be gravel or sand, and work your way up. Plants, ornaments, and toys will give your fish something to interact with or a place to hide. Live plants can be a great bonus to your new fish home but require extra maintenance. Stick with fake ones if this is your first try and level up as you go.

How do I set up my tank?

Make sure to put everything in your tank together, including water, before you bring home your new pet. For many fish, you’ll need to let the filter run for a few days or even longer to make the tank hospitable. Your fish need the proper oxygen and nutrients levels for them to thrive. Add all plants in advance, too, and keep an eye on them to ensure they take hold. Discard any dead plants or leaves immediately as those can disrupt the chemical balance of your mini ecosystem. 

If you have a water-testing kit, check the aquarium a few times at regular intervals while waiting for your new inhabitants. Also, examine your tank’s location at different times of day to check lighting and temperature. Fish are finicky, and you want to maintain a consistent habitat for them. 

You’re now ready to bring home your newest additions. Shop at a reputable store and examine your pets carefully before purchasing. Look for obvious signs of distress or sickness and poke around to confirm they’ve been kept in a big enough tank and are adequately fed. Once you get them home, they’ll need to acclimate to your water temperature before fully submerging. Last tip: Don’t go overboard buying every fish you’ve ever dreamed of owning. You can always get more, but too many will lead to fish congestion. We bet you’ll be an aquarium enthusiast in no time.

Rebekkah Adams
Former Contributor
Rebekkah’s been a writer and editor for more than 10 years, both in print and digital. In addition to writing about pets…
How to reduce nitrates in your aquarium quickly and effectively
Get the nitrates under control for your fish
Clown fish swimming through corals in an aquarium

It’s one more thing to add to the seemingly endless aquarium checklist, but you need to stay on top of your nitrate levels. You’ll never get them to zero (though if you do, let us in on the secret), but keeping the aquarium chemicals in balance will greatly increase your fish’s life span. While not quite as dangerous as ammonia, out-of-control nitrates can kill fish. Proper testing, cleaning, and filtering will enable you to reduce nitrates and keep your fish healthy. Keep reading for more tips on how to reduce nitrates in aquariums.

Read more
How to help a bird with a broken wing
Do these 4 things right away if you find an injured bird
Vet examines a falcon's wing

It’s hard to know when to get involved in the natural order of things, and many times, you’ll want to leave Mother Earth alone and let the ecosystem balance itself. But occasionally, the opportunity to step in and make a difference really does come along. If ever you stumble on an injured bird with a broken wing, you may be able to save them without harming nature in the process.

Before you ponder how to help a poor flyer, make sure the bird is actually hurt. Some animals fake injury to lead you away from a nest. If you’re certain the avian needs help, it’s time to spring into action. Here's how to help a bird with a broken wing.

Read more
The 7 most intelligent birds you can keep as pets
These species can all learn to talk or sing to keep you company
Blue macaw looking quizzically into the camera

Birds are actually one of the most intelligent creatures and have the unique skill of mimicking the human voice. Of course, most of this is just repeating back things they've heard, but they can also learn basic commands and even understand some concepts.

If you're looking for the smartest birds, you will probably want to stick with members of the parrot family. Although many other species are quite smart, like ravens, they don't all make good pets. By choosing from this list, you can bring home a bird to play with that's friendly to humans and intelligent.
What is the smartest bird?

Read more