What are good fish for a 40 gallon tank
Sarah Cherry
Published Apr 30, 2026
5 Guppies.5 Neon Tetra.5 Zebra Danio.1 Bristlenose Pleco.1 Dwarf Gourami.
What fish should I put in a 40 gallon tank?
All About 40 Gallon Fish Tanks It is well suited to keeping some of the most popular freshwater fish including Zebra Danios and Sparkling Gouramis. You can house a variety of medium sized fish, with the ability to create a beautifully decorated tank with driftwood, rocks, and live plants.
Is a 40 gallon tank good?
When deciding on a glass aquarium tank, it’s important to consider the type of animal that will call it home. The 40-gallon tank size is ideal for one or two medium-sized fish, a community of small fish like guppies or small- to medium-sized amphibians.
What can live in a 40 gallon tank?
- Blue-Tongued Skink. …
- Corn Snake. …
- Uromastyx (Spiny Tailed Lizard) …
- Gargoyle Gecko. …
- Kenyan Sand Boa. …
- Veiled Chameleon.
How many neon tetras can I put in a 40 gallon tank?
A 40 Gallon Tank (Buy Online) is the perfect size for a school of 20 to 26 Neon Tetras. A forty-gallon breeder is also a great fish tank since it’s still relatively compact, but it holds enough water to keep larger fish species.
How many guppies can I put in a 40 gallon tank?
Too many fish in an aquarium will cause oxygen levels to drop and waste and toxins to accumulate. To avoid this, you should learn about proper aquarium stocking. A good rule that has always worked for me is the 1 guppy per gallon rule or the 1 inch of guppy fish per gallon rule.
How much gravel do I need for a 40 gallon fish tank?
For one inch of gravel, you’ll use one pound per gallon and for two inches of gravel, you’ll use two pounds per gallon. A 40 gallon tank will use two, 20 pound bags for one inch and four, 20 pound bags for two inches.
How many betta fish can I put in a 40 gallon tank?
You can keep 15-20 of them in 40 gallons. These extravagant fish are beautiful, active and hardy. They are quite aggressive and males should be kept on their own.How many goldfish can I put in a 40 gallon tank?
Goldfish are poop-monsters. Estimating 10 gallons per fancy goldie, I would put no more than three in that 40 gallon, because you’re probably going to want to include a bottom feeder as well. Four would be absolute max, and honesty I wouldn’t push it to that, unless you’re a big, bug fan of constant water changes.
What fish can go with angel fish?Suitable tank mates include larger tetras and rasboras, gouramis, peaceful barbs, rainbowfish, corydoras and other medium-sized catfish. Angelfish can also be kept with discus in larger aquariums, if the temperature is maintained above 82° F.
Article first time published onCan you keep a bearded dragon in a 40 gallon tank?
Baby bearded dragons will do best in tanks no smaller than 20 gallons and ideally 40 gallons (36 inches long X 18 inches wide X 18 inches deep). Young adults and adults should have at minimum a tank of 55 gallons, but ideally 75 gallons.
Can goldfish live in a 40 gallon tank?
Since each goldfish generally require an average of 20-gallons of water, 2 to 3 healthy goldfish can live happily in a 40-gallon aquarium, but 50 to 60 gallons are recommended for 2-common goldfish or up to 4 small goldfish.
Whats the difference between a 40 gallon and a 40 gallon breeder?
A 40-gallon breeder aquarium is a fish tank with specific dimensions. Unlike other 40 gallon tanks that have a more rectangular base, breeder tanks have a bottom that’s more square. It’s designed for breeders to easily access their fish due to the lower profile.
How many koi can go in a 40 gallon tank?
Aquarium SizeNumber of Koi (4-6 in. long)Number of Koi (6-8 in. long)15–20 gal.6340 gal.157
Are GloFish tetras?
Overview. GloFish are brilliantly colored, beautiful fish. … All GloFish are bred in captivity, and their fluorescent color comes with natural breeding. GloFish are a species of danio, barb, tetra, shark or betta, and besides the betta, their care requirements are similar.
Will guppies eat tetras?
Of course, it can occur even with their species, as adult guppies often consume their fry. Tetras can also pose that problem, but it can, luckily, be resolved in many different ways. You can, for example, get a separate breeding tank where you can keep the guppy fry and grow it there.
Are ghost shrimp good for tanks?
Ghost shrimp are great aquarium cleaners, as they are scavengers and search the gravel for food or leftovers from other tank inhabitants. This is why the tank they are kept in should not be the cleanest. Although they are very small creatures, be careful not to overcrowd smaller tanks with fish and shrimp.
What kind of fish can I put in a 40 gallon breeder?
By far the most popular option in tanks of this size is to breed large fish. This tank will provide enough space for breeding fish, such as Bettas, Guppies, Clownfish, Plecos, or Cichlids. Don’t feel restricted only to fish though.
How many fish can be in a 40 breeder?
I have a 40 breeder with 2 clowns, Ruby head fair wrasse, Starry blenny, mandarin, and a royal gramma in QT right now. I would say 6-7 fish based on your filtration and how big they are when they mature, But an anthia and wrasse in a 40 I wouldnt recommend.
What cichlids can live in a 40 gallon tank?
How Many Dwarf Cichlids In A 40-Gallon Tank? You can add 10-12 dwarf cichlids in a 40-gallon tank. However, you should be very careful about maintaining the right water parameters. Multies, golden dwarf cichlids, and demasoni are some examples of dwarf cichlids you can easily keep in a 40-gallon.
What is better gravel or sand for a fish tank?
Gravel is the better choice for most freshwater aquariums. … Gravel also comes in a variety of colors so you can customize your tank and make it complement your fish. The Case for Sand Substrate. Sand doesn’t allow water to flow through it as well as gravel does.
How deep should fish tank gravel be?
It is recommended that fish tanks that have a capacity of 55 gallons and below should be provided with a layer of gravel that is about 2 inches deep.
How many pounds of substrate do I need for a 40 gallon tank?
We suggest using 1 pound of substrate per gallon, to achieve a 1 inch bed or 2 pounds per gallon, for a 2 inch deep bed. For a 40 gallon tank, this would be 40-80 pounds, depending on the depth needed.
Can I put a betta in with guppies?
So to conclude this article: yes, guppies and betta fish can live in the same aquarium. You will have a bit more work feeding your betta separately and you will also need to purchase live plants, but it is doable.
Do guppies get lonely?
Do Guppies Feel Lonely? Like humans, guppies are also social beings and love to stay around in good company. They like to be in a group of their own species and other non-aggressive ones. They usually do not feel lonely, but they can get stressed if they receive continuous bullies from other fishes.
How many neon tetras should be kept together?
Neon tetras are a schooling species, so you should keep a minimum of six to ten neon tetras together in one tank. Neon tetras will feel uncomfortable, get stressed, and maybe even die if you keep too few of them together. Additionally, neon tetras are active fish that require plenty of swimming space.
What is the easiest fish to take care of?
- GOLDFISH. Yes, the goldfish is top on the list. …
- GUPPIES. Small and brightly colored, guppies are another favorite for beginner aquariums. …
- ZEBRA DANIOS. …
- BUSHYNOSE PLECOS. …
- NEON TETRAS. …
- MOLLIES.
How many gallons should a betta fish have?
Bettas need an aquarium with a filter that is at least three gallons. Set up their new home at least one day before they arrive. The minimum size of the aquarium will depend on how many fish you have. For just a betta, the tank should be a minimum of 3 gallons.
How big of a tank do I need for 2 goldfish?
Goldfish require a minimum of 20 gallons, and an aquarium of that size is suitable for only two fish. The reason for a goldfish’s need for a large set up is because goldfish grow to be anywhere between 6 inches and 2 feet long depending on the type of fish you own.
Is a 40 gallon too big for a betta?
No tank is too big for a betta unless it’s unreasonably deep and the fish can’t swim to the top. Bettas love swimming and exploring large tanks as long as you provide lots of plants, driftwood, etc. for them to hide in.
What kind of fish can I put in a 45 gallon tank?
About 4–6 Platties / mollies / sword tails could inhabit a 45 gallon. About 20–25 zebra Danios or about 30 Guppies could also live quite happily in a 45 G. Based on these numbers, you could mix and match a few of these fish. 40 gallons (151.4 liters)=15 large Rainbowfish.