Are you thinking about adding a splash of color to your home with a new pet? Choosing a petco fish is one of the most exciting ways to start your journey into pet parenthood. Whether you want a tiny, glowing neon tetra or a majestic, flowing betta, there is a perfect swimming friend waiting for you. Many people start with a simple bowl, but did you know that even a small fish needs a cozy, filtered home to stay happy?
In this guide, we will walk you through everything you need to know about the different types of petco fish available today. We’ll look at easy-to-care-for freshwater stars and even some stunning saltwater beauties. Taking care of fish is a relaxing hobby that teaches us a lot about nature. Let’s dive into the details and find the right finned companion for your lifestyle!
Why Petco Fish are Great for Beginners
Starting a new hobby can feel a bit scary, but petco fish are a fantastic choice because the stores offer so much help. Most people start with freshwater species because they are “hardy.” This means they can handle small mistakes while you learn how to balance the water. Beginners often love the bright colors of GloFish or the playful personality of guppies.
When you visit a store, you’ll see that petco fish come with clear labels about their temperament. Some like to live in big groups (schooling fish), while others, like the betta fish, prefer to live alone. Choosing the right “roommate” for your tank is the secret to a peaceful underwater world. Plus, Petco offers a 30-day life guarantee on many freshwater friends, which gives new owners peace of mind.
Top Freshwater Species to Consider
If you want a tank that is easy to manage, freshwater petco fish are the way to go. Neon tetras are famous for their glowing blue and red stripes. They look amazing when they swim together in a group. Another favorite is the mollie or platy. These fish come in almost every color of the rainbow and are very active, making them fun to watch.
Don’t forget about the “clean-up crew”! Fish like the cory catfish spend their time at the bottom of the tank. They help eat leftover food that falls into the gravel. Adding a variety of petco fish to different levels of your tank makes the whole environment look full of life. Just remember to check how big they will grow so your tank doesn’t get too crowded!
The Beauty of Saltwater Options
For those who want a truly “tropical” feel, saltwater petco fish offer colors you won’t see anywhere else. Think of the famous clownfish (like Nemo!) or the bright blue hippo tang. These fish require a bit more work because you have to mix special sea salt into their water. However, the reward is a breathtaking coral reef right in your living room.
Saltwater petco fish often have very unique personalities. Some gobies like to dig holes in the sand, while cleaner shrimp will actually try to “clean” your hand if you put it in the tank! Because marine life can be more sensitive, it is important to have your water tested regularly. Most Petco stores will even test your water for free to make sure your saltwater friends stay healthy.
Essential Supplies for Your New Friends
You can’t just bring a petco fish home and put it in a glass of water! They need a proper habitat. A basic setup includes a tank, a filter to keep the water clean, and a heater to keep it warm. Most tropical petco fish like their water to be around 78 degrees. You will also need “water conditioner” to remove the chemicals found in tap water that can hurt fish.
Adding gravel and plants (real or plastic) is also important. These aren’t just for looks; they give your petco fish places to hide and feel safe. If a fish feels exposed, it can get stressed and sick. Think of the decorations as the furniture in their house. A happy fish is a colorful, active fish that will live for many years!
Understanding the Nitrogen Cycle
One big mistake new owners make is adding too many petco fish at once. Before your fish move in, your tank needs to grow “good bacteria.” This is called the Nitrogen Cycle. These tiny bacteria eat the waste that fish produce. Without them, the water can become toxic very quickly.
It is best to set up your tank and let it run for a few days (or even weeks) before buying your petco fish. You can use special “starter bacteria” found at Petco to speed this up. Once the water is safe, start with just one or two fish. This gives the tank time to adjust to its new residents without causing a “spike” in harmful chemicals.
Feeding Your Petco Fish Properly
Feeding time is usually the best part of the day! However, “overfeeding” is the leading cause of problems for petco fish. Most fish have stomachs the size of their eye. They only need a tiny pinch of food once or twice a day. If you see food sitting on the bottom of the tank after two minutes, you gave them too much.
Different petco fish need different types of food. Some like flakes that float on top, while others (like catfish) need pellets that sink to the bottom. For a special treat, you can even buy frozen brine shrimp or bloodworms. Giving your fish a variety of food helps them stay vibrant and strengthens their immune systems.
Maintenance: Keeping the Water Crystal Clear
To keep your petco fish healthy, you should perform a “water change” every two weeks. You don’t need to empty the whole tank! In fact, you should only replace about 25% of the water. This keeps the environment stable while removing dirt and waste. Use a gravel vacuum to suck up the “gunk” hidden in the rocks.
While you are at it, check your filter. If the pads are covered in brown slime, give them a quick rinse in the old tank water (not tap water, as the chlorine kills the good bacteria). Keeping a clean home for your petco fish prevents diseases like “Ich” (white spots) and ensures your underwater world stays beautiful for visitors to see.
Petco’s Health Guarantee and Support
One reason many people choose a petco fish is the “Minimum 30-Day Life Promise.” If you follow the care instructions and your freshwater fish doesn’t make it, Petco will often replace it or give you a refund. This shows they care about the animals and your success as a hobbyist. Just make sure to keep your receipt!
If you ever feel confused, the “Partners” (employees) at the store are usually very knowledgeable. They can help you pick out compatible petco fish so you don’t accidentally put a “bully” in with a peaceful group. They also offer free water testing, which is like a check-up for your aquarium. Don’t be afraid to ask questions—everyone starts as a beginner!
10. Creating a Theme for Your Aquarium
Part of the fun of owning petco fish is decorating! You can go for a natural look with driftwood and real green plants. Or, you can go “wild” with neon gravel, sunken pirate ships, and glowing corals. Some people even create themes based on movies or underwater “cities.”
Your petco fish will interact with the decor in different ways. Some will swim through tunnels, while others will “nap” on broad plant leaves. Designing the layout is a great way to express your creativity. Just ensure all decorations are “aquarium safe” so they don’t leak any dyes or chemicals into the water.
Frequently Asked Questions (FAQs)
Q1: What is the easiest fish for a small 5-gallon tank? A betta fish is usually the best choice for a 5-gallon tank. They are hardy, colorful, and don’t mind being the only fish in the habitat.
Q2: Do I really need a heater for my petco fish? Most tropical fish (like tetras and guppies) need a heater to stay around 78°F. Goldfish are “cold-water” fish and usually don’t need one.
Q3: How many fish can I put in my tank? A good rule of thumb is “one inch of fish per gallon.” However, it’s always better to have fewer fish and more space to keep the water cleaner.
Q4: Can I mix goldfish with tropical fish? It is not recommended. Goldfish prefer cooler water and produce a lot of waste, which can stress out delicate tropical petco fish.
Q5: Why is my aquarium water cloudy? This is often “bacterial bloom,” which is common in new tanks. It usually goes away on its own once the Nitrogen Cycle balances out.
Q6: How often should I turn off the aquarium light? Fish need a day/night cycle just like us! Leave the light on for 8–10 hours a day and turn it off at night to prevent too much algae growth.
Conclusion: Start Your Aquatic Adventure Today!
Bringing home a petco fish is the start of a rewarding and peaceful adventure. From the tiny glimmer of a tetra to the graceful dance of a goldfish, these pets bring joy and calmness to any room. By following the simple steps of setting up a clean tank, not overfeeding, and choosing the right friends, you’ll have a thriving underwater community in no time.
Are you ready to meet your new best friend? Head down to your local store and take a look at the amazing variety of petco fish available. Whether you start small or go big, the world of fish keeping is waiting for you!

