Revealed: Best Fish for 36 Gallon Tank

Something about the 36 gallon fish tank

A 36 gallon fish tank provides a unique and exciting opportunity for any aquarist looking to start a new fish tank. With an ample amount of space, you can create the perfect home for your freshwater or saltwater fish. When stocking your tank, it’s important to consider the size, shape and water parameters of your chosen species.

When selecting best fish for a 36 gallon tank, there are several options available to suit different preferences. If you want to keep livebearers like guppies or platys, they can be kept in harems with one male per three females. On the other hand, if you’re looking for large active species such as angelfish or cichlids, these should be kept in pairs or small groups of no more than six individuals.

Aquarium Starter Kits

Available on Amazon

Aquarium Starter Kits are all-in-one packages designed to help beginners easily set up a new aquarium. These kits typically include a tank, filter, lighting, and sometimes a heater for tropical setups. They may also come with water conditioner, substrate (like gravel or sand), and decorations or plants. The goal is to provide the essential equipment and accessories needed to start and maintain an aquarium, making the process more accessible to those new to the hobby. Starter kits often include a guide or manual with setup instructions and basic care tips.

Bestseller No. 1
Aquatop FORZA 175 GPH Power Filter for Aquariums – For 20-36 Gallon Tanks, Great for Salt & Freshwater Tanks, Keeps Water Crystal Clear, Advanced Filtration Design, PFE-6
  • POWER FILTERS FOR AQUARIUM: This Aquatop aquarium hang on back power filter is an effective and extremely quiet accessory to help maintain safe living conditions and a healthy habitat for your aquatic creatures to thrive.
  • GREAT FOR FRESH & SALTWATER TANKS: This 175 GPH filtration system is ideal for both fresh and saltwater aquariums from 20-36 gallon water tanks.
  • KEEP WATER CRYSTAL CLEAR: This fish tank filter uses a filtration chamber system with replaceable filter sponge cartridges enhanced with Premium Activated Carbon and a Bio Grade Insert to help keep your aquarium water crystal clear.
  • SUPERIOR FILTRATION: Aquatop’s FORZA aquarium power filter comes equipped with all the necessary filter media to ensure superior filtration.
  • ADVANCED FILTER DESIGN: The FORZA aquarium filters innovative and advanced design removes free-floating debris from both freshwater and saltwater aquariums. For best results, replace cartridges monthly.
Bestseller No. 2
MQ 20 in Submersible LED Aquarium Light, 3.5W Color Changing Fish Tank Light with Remote Control, IP68 Crystal Glass 24 LEDs Lights Bar, for Fish Tank 25-30 inch
  • Colorful Visual Effect- 24 keys controller can provide 16 colors and 4 modes (smooth/flash/strobe/fade) for your fish tank. Multi Color Changing LED Lamp gives bright light effects and a totally different vision.
  • Lighting Brightness Adjustable – Two buttons (Rise / Down) in the left-top of the remote used to adjust the brightness for this light. It can make your fish tank a colorful landscape.
  • Energy saving – 5050 LED lights chip make the fish tank lights 35% brighter than others. 5050 SMD lamps are safe, low heat and long-lasting. Can be widely used in fish tank, turtle tank, reptile tank, pond and so on.
  • IP68 Waterproof – The fish tank light can be fully submerged in water and work underwater. 2 Strong Suction Cups allow you to fix the submersible fish tank light to the specific place as you wish.
  • Safety Design – With low voltage of 12V, the LED aquarium light is safe and won’t cause any harm to people or fish. And the explosion protection acrylic glass give a more clear and safer light for your aquariums.
SaleBestseller No. 3
Tetra Complete LED Aquarium 29 Gallons, Includes LED Lighting, Filtration, Heater and Accessories
  • GLASS AQUARIUM KIT: Glass aquarium with low-profile hinged hood houses energy efficient white LEDs to create a natural underwater shimmer effect
  • EASY TO SET UP: Complete kit includes everything you need to get started
  • FILTER INCLUDED: Comes with the Tetra Whisper PF 30 Power Filter with Tetra Large Bio-Bag Filter Cartridge
  • WITH HEATER: Includes a 200-watt heater and thermometer, along with a fish net, Tetra AquaSafe water conditioner sample, TetraMin food sample and setup guide
  • 29 GALLON TANK: Measures 30 inches wide by 12 inches deep by 18 inches high

Front tanks are the ideal choice for fish-keepers looking to add a unique, visually appealing display to their home or office. A front tank is an aquarium with a panel of glass at the front and two shorter sides, allowing for an unobstructed view of the fish swimming inside. This type of aquarium is designed to provide maximum visibility while taking up minimal space. They come in a variety of sizes and shapes, allowing you to customize them to fit your decor and individual needs. Front tanks can range from 10 gallons all the way up to 200+ gallons, allowing you to choose one that best fits your budget and space requirements. Because they have such large viewing windows, it’s essential that you make sure they are kept immaculately clean so that your fish can be seen clearly without any obstruction caused by algae or other debris.

Front tanks tend to feature more complex filtration systems than standard aquariums due to their size and shape. The most common type of filtration used in these tanks is an external canister filter, although hang on back filters may also be used depending on the size and setup of the tank. Additionally, many advanced aquarists opt for using protein skimmers as part of their filtration system in order to remove organic waste before it has a chance to break down into harmful nitrates or phosphates which can lead to algae growth or water quality issues down the road.

fish for 36 gallon tank

Top Fish Choices for a 36 Gallon Tank

Guppies are one of the most popular choices for a 36 gallon tank and make an excellent addition to your aquarium. Guppies come in a wide range of colors, sizes and shapes, providing plenty of variety to your tank. They’re also known for being peaceful, hardy fish that can tolerate a wide range of water parameters and pH levels which makes them perfect for most tanks. Guppies require supplemental food such as flakes or pellets but they can also survive on live foods like brine shrimp and mosquito larvae.

Barbs are another great choice when stocking a 36 gallon aquarium. Most species stay relatively small so they won’t take up too much space in the tank but they do have quite active personalities which is great if you want some lively fish swimming around your tank! Barbs generally prefer schools of 6-10 or more individuals so it’s important to make sure you buy enough at once to ensure their social needs are met. Barbs should be given plenty of swimming space as well as caves or hiding spots where they can rest throughout the day.

Finally, Corydoras Catfish make great additions to any community aquarium due to their docile nature and hardiness against disease and poor water quality conditions. Corydoras catfish prefer groups of 6 or more members since this allows them to behave naturally with each other without feeling stressed out by constant competition for food.

36 gallon fish tank with Corydoras catfish, tetras, rasboras, gouramis
FishBehaviorsCompatible Tankmates
GuppiesGuppies are a type of tiny, brightly colored fish that are popular due to their energetic and gregarious nature. Guppies are community fish that thrive when kept with others of their kind. Oftentimes, groups of them would “school” together and swim in unison around the tank.
Guppies are curious fish that like to swim around and see what’s new. If anything new is placed in the aquarium, they will most likely swim around and examine it.
Guppies are placid fish who get along well with other fish. It’s crucial to choose tankmates wisely, though, because certain species can be violent or territorial if they feel threatened by guppies. When possible, separate guppies from larger fish that might mistake them for prey, as well as territorial or aggressive fish like cichlids or bettas. Make sure the tank is big enough for all the fish, and give them lots of places to hide and plants to use as territorial markings and stress relievers.
Betta Fish
Betta fish are not generally considered peaceful fish, especially when they are placed in a tank with other fish. They are known to be aggressive and territorial, especially towards other male Betta fish. If two male Bettas are placed in the same tank, they will often fight to the death. Female Betta fish can also be aggressive towards each other, although to a lesser extent than males.Betta fish should be kept either alone or with other calm species, such as tiny, nonaggressive fish like neon tetras or guppies. To assist establish territories and lower stress levels, it’s also helpful to have plants and hiding spots in the aquarium. Check on Chewy
Harlequin RasboraUnlike several other species of fish, Harlequin Rasboras are not aggressive or territorial. They get along well with other fish, so you may keep a communal tank full of them.
Keep at least six of them together, while groupings of 10 or more will get the best results.
Do not house them alongside cichlids, huge catfish, or aggressive tetras, all of which are known to be aggressive and predatory. Fish who hang out at the tank’s bottom are likely to annoy Harlequin Rasboras because of their central location. You shouldn’t keep them with fish that live on the bottom of the tank, such loaches or catfish.
You should not house them with fish like barbs or some tetras, which are noted fin-nippers.
Although a docile species, Harlequin Rasboras may become anxious if their tank is shared with fish that are too busy. They shouldn’t be housed alongside hyperactive fish like danios or cichlids.
Dwarf GouramiDwarf Gouramis are quiet and may live in a tank with other peaceful, easy-to-care-for fish. Nevertheless, one male per tank or a bigger group of females is suggested. Dwarf Gouramis are labyrinth fish, meaning they have a particular organ that lets them breathe air straight from the water’s surface, allowing them to thrive in low-oxygen situations like stagnant ponds or swamps.
Peaceful fish can live alongside dwarf gouramis. Dwarf Gouramis’ excellent tankmates include:
Dwarf Gouramis may live with neon, cardinal, or ember tetras. Peaceful and occupying various tank regions reduces hostility.
Corydoras catfish: These tranquil bottom-dwellers clean the aquarium. They’re harmless to Dwarf Gouramis.
Guppies: Dwarf Gouramis may live alongside tranquil, colorful guppies. They don’t fight for food since they’re in separate regions of the tank.
Dwarf Gouramis can live alongside platies, swordtails, and rasboras. Because to their long, flowing fins, Dwarf Gouramis should not be kept with aggressive or fin-nipping fish.
Before introducing any fish to your aquarium, make sure they are compatible and observe their behavior.
Corydoras CatfishCorydoras catfish live on the bottom and scavenge for food. Social Corydoras catfish should be kept in groups of five or six. As a group, they will be more active, less agitated, and more likely to school and shoal.
Corydoras catfish seldom injure aquarium fish. They’re best kept alongside other calm fish since more aggressive fish can outcompete for food.

Compatible Tankmates: Non-aggressive fish may live with Corydoras catfish. Corydoras catfish do well with tetras, rasboras, gouramis, and other peaceful community fish.
Cherry BarbSmall and non-aggressive, cherry barbs are a common freshwater fish. Cherry Barbs tend to be timid fish that like to spend much of their time hiding amid the tank’s foliage and ornaments. This is typical when they are being exposed to a new place, but they normally get more comfortable and confident as time goes on.
Cherry Barbs, in general, are an excellent addition to a community aquarium since they are both lively and sociable.
Do not house them alongside cichlids, huge catfish, or aggressive tetras, all of which are known to be aggressive and predatory.
Cherry Barbs’ long, sweeping fins are a tempting target for fin-nipping fish. You shouldn’t keep them with fish that are known to nibble fins, including certain tetras, barbs, and gouramis.
It’s not a good idea to house them with slow-moving fish like angelfish or discus.
Cherry Barbs should not be housed with other fish species, especially males of the same species, such as male guppies or male bettas.
Neon TetraNeon tetras are one of the most iconic aquarium fish, due to their stunning coloration and hardy nature. They make an ideal addition to any community tank and can coexist peacefully with many other species, so long as the correct environment is set up for all the inhabitants.
In the wild, neon tetras are schooling fish that generally prefer slow-moving waters such as rivers and streams. To replicate this in a home aquarium, they should be kept in groups of six or more with plenty of hiding spots like rocks and plants available. Neon tetras also thrive best when water conditions remain relatively consistent, making regular water changes necessary for them to stay healthy.
In terms of other compatible species, neon tetras enjoy living alongside peaceful fish like guppies or Corydoras catfish.
Neon Tetras have flowing fins that can be attractive to fish that like to nip or bite fins. Avoid keeping them with fish species that are known to be fin nippers, such as certain types of tetras, barbs, and gouramis.
Zebra DanioThe zebra danio is an excellent choice for beginning and experienced aquarium hobbyists alike. This hardy fish is capable of surviving in a range of tank sizes and water conditions, making it a great choice for community tanks. Zebra danios are active swimmers who love to school together, especially when there are plenty of other fish present; they get along with most peaceful tankmates as long as their own needs are met.
These lively fish prefer to swim in the middle levels of the aquarium; they need plenty of open space around them so that they can move about freely without being hindered by too much vegetation or ornamentation. To ensure that the zebra danio has enough room to swim, it’s best to pair them with smaller species such as tetras or rasboras that stay near the top level of the tank.
AngelfishAngelfish are popular aquarium fish due to their bright colors and fascinating behaviors. While they may be small, these tropical fish can play an important role in the balance of any tank. Angelfish behavior is affected by the other inhabitants in the tank, so it’s important to choose compatible coexisting fish when stocking your aquarium.
Many types of freshwater community fish get along well with angelfish, such as tetras, gouramis, mollies and various species of barbs. These peaceful species tend to keep to themselves while still providing interesting activity for angelfish to observe. A variety of live plants also provides a natural environment for angelfish that includes hiding spots and plenty of places for them to explore. Avoid aggressive or territorial species like cichlids when stocking your tank as this could lead to conflict between the different types of fish.

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How many fish can I keep in a 36-gallon tank?

When setting up a fish tank, it is important to consider the type and number of fish that can be kept in the tank. A 36-gallon tank can support up to six average sized fish, such as goldfish or guppies. When determining the number of fish for your aquarium, it is essential to remember that overcrowding can lead to stress and disease among your fish population.

It is recommended to introduce only one type of species into a single tank, as different types of fish may have different needs and preferences. Additionally, take into account how fast certain species grow; this will help you decide the maximum size of each individual species’ population in your aquarium. Finally, regular water changes are necessary when keeping multiple fishes in an aquarium; this helps keep harmful toxins at bay and ensure that all inhabitants have access to clean living conditions.

Can I mix different species of fish in a 36-gallon tank?

Mixing fish species in a 36-gallon tank can be a challenging but rewarding endeavor. Knowing which species of fish are compatible and how to properly introduce them is the key to success. Many aquarists, when stocking their tanks, opt for different species of fish that will coexist in harmony.

When deciding what types of fish to mix together, it’s important to take into account the size and temperament of each one. Fish with similar sizes and temperaments should be chosen so they can live peacefully without disrupting the balance in the tank. Furthermore, it’s essential to research beforehand whether certain species are territorial or aggressive towards others as this could cause issues further down the line if not managed correctly from the start.

What are some good starter fish for a 36-gallon tank?

If you’re looking to start a new freshwater fish tank, picking the right fish is key. A 36-gallon tank presents plenty of opportunity for stocking a wide range of species. For beginners, it’s important to start with small and hardy fish, as they are easier to care for and more resilient when establishing a new aquarium. Here are some good starter fish for your 36-gallon tank:

The peaceful guppy is always a great choice for beginner aquarists as they require little maintenance and will quickly populate your tank with bright colors. The zebra danio is another excellent starter fish that can easily adapt to various water parameters and will school together in the upper region of the aquarium creating plenty of activity.

Can I keep a single large fish in a 36-gallon tank?

A 36-gallon tank might seem like the perfect size for a single large fish, but before you go out and buy one of these aquatic giants, it’s important to know what you’re getting yourself into.

First off, if a fish is labeled as ‘large’ then it needs space. A 36-gallon tank might seem like plenty of room when looking at the specs online or in the store, but trust us—it’s not enough! Without adequate space to move around and stretch its fins (or whatever other appendages), your fish will quickly become bored and restless. And don’t forget about the added stress that comes with living in an overcrowded environment!

That being said, small tanks are great for keeping some smaller species of fish such as Goldfish or Guppies.

Can I keep a school of fish in a 36-gallon tank?

Can you really fit a school of fish in a 36-gallon tank? The truth is, if you choose the right type of fish, then yes!

Of course, there are some factors that need to be taken into consideration. Firstly, the type and size of the fish – after all, if they’re too big or too many then it’s impossible to fit them in. Secondly, water quality – when overcrowded with too many fish it is harder to keep up good water quality as waste accumulates faster.

But don’t let this discourage you from having a school of fish just yet! With careful planning and regular maintenance any aquarium can be enjoyable and easy to maintain.

Can I keep bottom-dwelling fish in a 36-gallon tank?

If you’re a fish enthusiast who has their eyes on a 36-gallon tank, you may be wondering – can I fill this thing with bottom-dwelling fish? The answer is yes – but it won’t come without its own unique set of challenges. It can be done, but it’s not for the faint of heart!

For starters, it’s important to recognize that overcrowding will be an issue if you choose to keep bottom-dwellers in your 36-gallon tank. As any experienced aquarist knows, there is such a thing as too much of a good thing. That said, if you want more than just one or two fish swimming around in your tank – we suggest investing in some creative problem solving skills!

Can I keep a mix of saltwater and freshwater fish in a 36-gallon tank?

When considering the age-old question of whether or not you can keep a community of different species of fish in a 36-gallon tank, the answer is yes – but with some caveats. While it is possible to keep multiple fish species in such an enclosure, it’s important that the owner understand the needs and behaviors of each type in order to ensure that there is enough space for everyone to be comfortable.

For starters, stocking too many fish may cause overcrowding and lead to aggressive behavior among them. Additionally, if you’re keeping multiple bottom-dwelling fish like catfish or loaches together in a 36-gallon tank, they could get territorial over their respective areas. And finally, don’t forget about water quality – adding too many inhabitants will only increase your filter’s workload and make it harder for your ecosystem to stay balanced.

Jim Coffey

Jim Coffey is an authoritative blogger specializing in Aquatic Life, Fish Diseases and Parasites, and Aquarium Setup. His insights and expertise offer valuable guidance to both novice and experienced aquarium enthusiasts.
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