Freshwater Aquarium

Best Pet Fish to Buy: Best Freshwater Aquarium Fish Combination

You need to buy fishes knowing well about their maximum size when they will be fully grown

Having a fish tank is surely fun but setting it up and deciding which is the best pet fish to buy can be overwhelming. There are numerous fish you can choose from for your fish tank; but how? You need to purchase freshwater aquarium fish knowing well about their maximum size. Remember when they will be fully grown so that your fish tank can accommodate them in the future. Also, you cannot grow certain species of freshwater aquarium fish with certain other types since not all of them are compatible with each other. While some species are very aggressive and they may hurt the other fish, some other fish are massive enough to feed on the smaller ones. This article will help you decide the types of fishes that you want to keep and how to go about the selection process. You can also get the freshwater algae eater fishes for your home aquarium.

Try to buy your fishes from a local pet store that is meant for aquatic life and are able algae eaters for your home aquariumThis way, the store helpers will be better informed about the combination of fishes that you can help. Learn more about the territorial conflicts between different species and decide a combination of fishes that are compatible with each other. Here is a step-by-step guide that will help you know about the best pet fish to buy:

Step by step guide to buy best pet fish

Size of the fresh water fish and size of your aquarium

best pet fish to buy
Size of fishes and Aquarium

Most of the freshwater aquarium fish breeds will fit in a 15-gallon fish tank. You need to decide the size of your community fish tank according to the space available for you to keep it and you need to find best pet fish to buy according to the size of the community fish tank. Please do not get fooled by the size of the fish that you see in the pet store because most of them will be in their juvenile form. Some freshwater aquarium fish can grow up to the size of your foot in a few months! So, what you need to do is to do a little bit of research on the fish species that you want to keep. Try to know the maximum size they will grow into and how much space will they need if they live in a colony by either online searches or by talking to a knowledgeable pet store worker.

Aqueon Aquarium Fish Tank Starter Kits with LED Lighting:

This aquarium is great and is priced at 45 dollars, and it has a 4-star rating along with excellent customer reviews. The whole kit is fantastic and is available on in two variants 10 gallons and 20 gallons.

This community fish tank is currently in stock and is shipped, as well as, sold by The bright LED lighting brings the aquarium to life; the fish tank also includes a 10-gallon glass aquarium, low profile full hood LED light, quiet flow LED pro power filter with the Medium cartridge, 50W preset heater, premium fish food, water conditioner, fishnet, and a thermometer.

The filter has a red LED light that flashes to indicate when it’s time to change the cartridge. The pre-set heater will keep your aquarium temperature at a consistent 78 degrees; this temperature is excellent for tropical fishes; it also comes with a setup guide.


Beginner? Start with the easy breeds

best pet fish to buy
Start with Easy Breeds

If you’re new to the fish tank and taking care of fish, it’s safe that you choose best pet fish to buy and start with breeds that are of low maintenance. Even though fish do not require your time and effort as much as most of the other common pets like cats and dogs, some of the breeds are very sensitive. You can buy tropical freshwater fish that are less fragile so that you can learn how to take care of them without accidentally killing them.

Glofish, Cichlids, Goldfish, Guppies, small Catfish, the Tiger Pleco, and the Silver Hatchet are a few easy to maintain best freshwater aquarium fish. You can also get Betta fish if you’re a beginner since they do not require a lot of your effort and time. However, if you want to keep Betta fish, you better keep just the one breed since they are not compatible with any other breeds.

What not to get

best pet fish to buy
What not to get

Try not to get the easiest fish to keep that may die off easily because you may feel bad and lose interest in the whole idea when your good pet fish die at the beginning of your fish tank experience. You can go for tropical freshwater fish that don’t need filters and the fish that can live in a bowl. Fishes like discus need to be avoided if you’re a beginner since they like to live in clean and fresh water. It means that you will have to change the water twice every week. Also, this breed of tropical freshwater fish can get sick very fast and spread the disease to other community fish as well which is why it’s better to avoid them in the beginning. Once you gain some expertise in the area, you can buy fragile fish too.

Check Behavioral compatibility while you go for best pet fish to buy

best pet fish to buy
Behavioral compatibility

Choose the best freshwater aquarium fish that are behaviorally compatible with each other if you want your aquarium to have different breeds of fish. It means that you cannot keep aggressive freshwater community fish like Beta which is likely to attack other fish in the tank. Friendly freshwater tropical fish like Danios, Platies, Swordtails, and Mollies are compatible with most of the other freshwater aquarium fish. Neon or Glowlight Tetras, GlassFish, breeds of guppies, and Ghost Shrimp, are a few other fish that would make the best freshwater aquarium fish combination for your aquarium.

Temperature requirements

best pet fish to buy
Temperature Requirements

There are two types of best pet fish to buy from – cold water and warm water fish. If you want to set up a community fish tank with more than one species of fish, then you need to make sure that their temperature requirements are the same. For example, colorful freshwater fish like the goldfish thrive in cold water. They should not be kept in the same tank with warm water breeds like Betta. Most of the tropical fish require warm water and it’s better to set up an aquarium water heater if you’re planning to keep them. Tropical freshwater fish tank and marine fish tank are maintained at a temperature that’s ideally between 22-30 °C (71-86 °F).

If you’re a beginner and you want cold water fish,  then you can go for goldfish, Tetras, and the White Cloud minnow. On the other hand, the easiest fish to keep in warm water include Danios, the Black Molly, Platies, Swordtails, and the Black Skirt Tetra. Please do not try to mix cold water fish with warm water freshwater tropical fish and put them in a temperature that’s not ideal for them. It can lead to their death in a few hours.

Uniclife HT-6050 Aquarium Heater Submersible with Thermometer for 10 Gallon Fish Tank, 50 W:

This product is currently in stock and is priced at 10 dollars on This heater has a wide application and can be used for tropical freshwater fish tanks. It can be easily adjusted and displayed at the upper portion of the tank.

Territorial fish and full aquariums do go well together

best pet fish to buy
Territorial Fishes

Do not put territorial fish in full aquarium where there is plenty of other fish as well. It’s because territorial fish tend to maintain a territory of their own within the fish tank which can be a piece of decoration or a particular area of the tank itself. These fish attack other freshwater fish that try to invade their territory which can hurt or result in the death of other fish. If you want territorial fish that bad, you will either have to avoid getting other fish, or you will have to maintain a freshwater aquarium setup big enough so that there’s enough space for all the fish to swim around. Examples of territorial fish include Cichlids and the Jack Dempsey.

Fish with similar feeding requirements

best pet fish to buy
Fishes with similar feeding

Try to know the best fish to buy with similar feeding requirements in your freshwater community fish tank so that all of them stay healthy and you don’t accidentally get any of them sick while trying to feed the others. Most of the fishes that you can maintain in a fish tank can be fed with the fish food flakes that you can buy at a pet store. Not all freshwater tropical fish eat food flakes that you get from the pet store. For example, fish breeds like Catfish are scavengers, and they feed on unwanted organic debris that sediment on the floor area of the freshwater fish tank. Some other breeds like Knifefish, Jack Dempsey, and Bolivian Ram eat live food like bloodworms, and some fishes eat invertebrates which will cost you a lot. Some fishes can eat your other fishes, so make sure that you mix fishes that have similar feeding habits.


For healthy and colorful fish for freshwater aquariums, you will have to provide them with good food; this fish food is excellent and is available on for 12 dollars. The sizes that are available range from 1.1 ounces to 5.7 ounces. This product contains all the key nutrients that are needed for a complete and balanced diet for all the tropical community fish.  The ingredients include menhaden and squid that will provide the fish with all the necessary amino acids and optimal growth.

The food is created in a way that the all the nutrients are absorbed, and the fishes discharge less waste; this means that the water will stay cleaner and clearer because of this. This tropical aquarium fish will have to be fed twice a day, and the fish will consume it in three minutes.

Buying individual fish

best pet fish to buy
Buying Individual Fish

You can visit a local best fish pet store for the best pet fish to buy. You may seek the help of the store person in case you’re confused what combination of fishes you must buy. Do not buy all the fishes on your list together. Because you need to introduce each breed with at least a gap of three days. Also, try to get the fishes from a nearby pet store so that you don’t have to travel for long after buying them. Remember that they can stay healthy inside the plastic bag only for two and a half hours. You may not get rare and exotic breeds of fishes in local stores. If you want those fishes, you can try buying them online. PetSolutions, PetCo, or LiveAquaria are a few online stores where you can purchase fishes for your fish tank.

Choosing the right fish

If you don’t want your best freshwater aquarium fish to breed and increase the population of your tank, try to buy cool freshwater fish of the same sex. We can say that’s the best freshwater aquarium fish combination. Breeds like guppies can reproduce pretty quickly and increase the total population of your tank in just a few months. While selecting individual fishes from the pet store, seek the help of the store worker to take out only same-sex fishes in such a situation. On the other hand, if you want your fishes to have babies and make your fish tank a happy little family place, you can buy fishes of both the sexes. Nonetheless, it’s essential that you sell your fishes or put them up for adoption after new babies are born because it’s terrible to overpopulate your aquarium.

When you’re buying new fishes, make sure that each one of them is healthy and is not infected or sick. Most of the times you can make out if they are healthy by just looking at them. Because sick fishes will have visible infections over their body or they may not be active as the other fishes. Try to pick out fishes that are actively swimming around in the tank and are eager to eat when you feed them.

We hope, now that you know how to pick your fishes. Here are a few best freshwater aquarium fish that you can consider buying:


best pet fish to buy
Gold Fish Pets

When most of us think of having an aquarium at home, we think of goldfish. It’s the best fish for the small tank. These are the most common and beautiful fish that you can have. They are a great choice if you’re a beginner. Even though we spot goldfish in small round fish bowls in places like office cubicles and hotel reception desks, it’s not the ideal way to keep them. It’s a lesser known fact that goldfish can grow up to 14 inches in the wild. So, makes it a necessity to keep them in a tank that can hold at least 20 gallons of water.


best pet fish to buy
Angel Fish Pets

These fish are called “angel” fish for a reason; Angelfishes are breathtakingly beautiful and best fish for a small tank! They belong to the Cichlid family which also contains Discus, Oscars, and Parrotfish. They can grow up to six inches in length and eight inches wide. The ideal water condition for them is slightly acidic. Hence, you need to keep them in a tank that can hold at least 20 gallons of water. Angelfish are omnivorous, and they feed on both plant matter as well as meat. So, try not to keep them in an overcrowded tank because they may savor your other fishes. As they grow older, Angelfish become more aggressive. It means that you need to keep them away from small fishes and fin-nipping species. It’s one of the best pet fish to buy for your freshwater home aquarium.

Neon Tetra

best pet fish to buy
Neon Tetra Pet fish

The Neon Tetra is a treat for your eyes which is the best fish for 3-gallon tank too. They look like a bolt of blue lightning with a bright red edge. These fishes look great when they are grown in a colony. Moreover, if you want your aquarium to look good, these are the fish that you must never miss out. These are small aquarium fish that do not grow huge.


Guppies are one of the most popular breeds and are fish that don’t need filters. Because they are very easiest fish to take care of. Males are more colorful and vibrant than the females. So, if you don’t want them to breed, you can buy the male ones. They do not grow too big and hence can be kept in smaller fish tanks as well. Guppies are the best freshwater aquarium fish.


best pet fish to buy
Molly pet fish

Mollies are semi-aggressive species of fish that are pitch-black in color, easiest fish to care for and best pet fish to buy. You may not be able even to spot their eyes because they look like black swimming creatures. This doesn’t mean that they are not beautiful because they are damn gorgeous! You can spot mollies in a fish tank from long distances as well.

A few other freshwater best pet fish to buy are Oscar, Platies, Cherry Barb, Pearl Gourami, Plecostomus, Swordtails, Zebra Danios, Discus, Killifish, Rainbowfish, Corydoras Catfish, and Bettas.


As mentioned before, If you want to know the best pet fish to buy, you will need to do a fair amount of research before you decide to become a pet parent. You need to understand the responsibility that comes along with maintaining aquatic pets. Hopefully, this article has given you enough insight into what needs to be included in fish-care and aquarium maintenance. If you have any queries or suggestions, feel free to add them in the comment section below!


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