A 10-gallon tank is a small, compact aquarium suited to nano fish, small invertebrates, and homes with limited space. It comes either as an empty glass tank you outfit yourself or as a starter kit with a filter, light, and sometimes a heater. The standard footprint is about 20 x 10 x 12 inches.
A 10-gallon tank can hold a school of 6 to 8 of the smallest tetras, such as ember tetras, neon tetras, or green neon tetras. Ember tetras (about 0.8 inches) are the safest fit. Neon tetras are borderline: Seriously Fish suggests a larger tank (about 14 gallons) for them, though many keepers run 6 to 8 in a 10-gallon with live plants. Larger tetras such as black skirt, serpae, or rummy nose need 20 gallons or more. Use a heater and a gentle filter, and don’t add a second large fish.
Many 10-gallon tanks suit beginners because the kits include most of the equipment. A small tank is less forgiving than a large one, though, because water chemistry changes faster, so stocking and maintenance matter more.
| Parameter | 10 gallon tetra tank |
|---|---|
| Standard size | About 20 x 10 x 12 inches |
| Filled weight | About 83 lb of water, roughly 95 lb with the empty glass tank, and 110-120 lb with substrate and decor |
| Best tetras | Ember tetras; green neon tetras; neon tetras (borderline) |
| School size | 6-8 (8-10 for ember tetras in a heavily planted tank) |
| Temperature | 74-77°F suits neon and ember tetras |
| Filter | Gentle flow, rated for 10 gallons or more (roughly 40 gallons per hour) |
| Cycling | Cycle the tank for about a month before adding fish |
What Are the Best 10 Gallon Fish Tanks?
GloFish Aquarium Fish Kit Tank  | GloFish | 10-gallon glass tank, blue and white LED lights, fluorescent plants, heater and thermometer, power filter | Check Price |
Tetra Glass Aquarium 10 Gallons  | Customizing | 10-gallon glass tank | Check Price |
Aqueon Aquarium Fish Tank Starter Kit with LED Lighting 10 Gallon Fish Tank  | Beginners | 10-gallon glass tank, LED lighting, filter, submersible preset heater, water conditioner sample, fish food sample, thermometer, fishnet, setup guide | Check Price |
Aqua Culture 10 Gallon Aquarium Starter Kit with LED  | Small Budgets | 10-gallon glass tank, low-profile hood, LED lighting, internal filter, integrated cutouts for feeding, tetra food and water care samples | Check Price |
Aqueon NeoGlow LED Aquarium Kit Orange 10  | Children | 10-gallon glass tank, an LED hood, a heater and thermometer, a power filter and filter cartridge, water conditioner and fish food samples, a fish net, a setup guide, decorative plants, multi-colored gravel, black backing | Check Price |
Marina LED Aquarium Kit, 10 gallon  | Planted aquariums | 10-gallon glass tank, clip-on filter with quick-change filter cartridges, long-lasting LED lights, fish food, water conditioner, biological supplement samples, fishnet, care guide | Check Price |
GloFish Aquarium Kit Fish Tank: Best For Keeping GloFish
This tank is best for fish that have been genetically engineered to glow in LED lighting, like GloFish danios and GloFish tiger barbs.
Maintenance is simple: replace the filter cartridge on the manufacturer’s schedule, do regular water changes of about 25%, and use a siphon to clean the substrate and decor.
PROS
- Easy to set up
- Quiet pump
- Affordable price
CONS
- Tank lid is flimsy
- Doesn’t include an air pump or decorations other than the fluorescent plants
Tetra Glass Aquarium 10 Gallons: Best For Customizing
This 20 x 10 x 12-inch tank is easy to clean, with no built-in or non-removable parts.
It is a plain glass tank with no filter or light, so it works for any small or nano fish suited to 10 gallons, including a school of ember tetras.
PROS
- Comes with no add-ons, so you can choose your own
- Affordable price
- Easy to clean
CONS
- Often more expensive to buy separate equipment than buying an all-in-one kit
- Doesn’t come with a lid
Aqueon Aquarium Fish Tank Starter Kit with LED Lighting 10 Gallon Fish Tank: Best for Beginners
Substrate, plants, and decorations aren’t included.
The filter and heater in the kit ensure the tank’s water remains clean and consistently at 78°F, ideal conditions for most small tropical fish.
Maintenance is simple thanks to the powerful filter, which has a flashing LED light that indicates when it’s time to change the cartridge.
PROS
- Good filter flow
- Saves money with an all-in-one package
- Food and water conditioner samples are useful extras
CONS
- Heater is preset and not adjustable
- Tank lights aren’t waterproof
Aqua Culture 10 Gallon Aquarium Starter Kit with LED: Best 10 Gallon Kit for Small Budgets
This kit is one of the cheaper options and comes with almost everything needed to get started (you still need decorations, plants, substrate, and a heater). Check the current price.
The tank dimensions are 20 x 10 x 12 inches.
This 10-gallon aquarium kit has a quiet, powerful filter and bright tank lighting. Maintenance and cleaning are easy due to the tank’s compact size and a good filter.
PROS
- Bright tank lighting
- Ideal low-cost kit for beginners
- Quiet, powerful filter
CONS
- Some customers experienced a leaking seal
- Doesn’t include a heater
Marina LED Aquarium Kit, 10 Gallon: Best for Planted Aquariums
The Marina LED Aquarium Kit features a bright LED daylight-effect light incorporated into the aquarium canopy, making it ideal for people who want to set up a planted aquarium.
This kit includes a clip-on filter with quick-change filter cartridges, samples of fish food, a water conditioner, biological supplements, a fish net, and a care guide.
Fishkeepers will need to purchase their own water heater, substrate, and decorations alongside this kit. Cleaning the Marina LED Aquarium Kit is easy, but the filters are small and need to be replaced frequently.
PROS
- Powerful LED light ideal for growing aquatic plants
- Easy to assemble
- A good starter kit for beginners
CONS
- Doesn’t include a water heater
- Filters need replacing regularly
Aqueon NeoGlow LED Aquarium Kit: Best for Children
The green LED lighting in the tank causes albino fish and pale-colored fish to glow and brings out the neon coloration of GloFish.
The kit includes everything required to get started straight away, including a 10-gallon glass tank, an LED hood, a heater and thermometer, a power filter and filter cartridge, a water conditioner, fish food samples, a fish net, a setup guide, decorative plants, multi-colored gravel, and black backing.
Cleaning the tank is easy by doing regular water changes and replacing the filter cartridge as the manufacturer recommends.
PROS
- Easy to maintain
- Colorful and exciting to look at
- Includes artificial plants and gravel
CONS
- Heater is poor-quality
- Not enough gravel to cover the bottom of the tank
Which Tetras Can Live in a 10 Gallon Tank?
Only the smallest tetras are a good fit. Keep them in a group of at least 6, because tetras are schooling fish and become shy and stressed in small numbers.
- Neon tetras: 6 to 8, borderline for 10 gallons. They reach about 1.2 inches, and Seriously Fish recommends a base of at least 24 x 12 inches (about 14 gallons) and a group of 8 to 10.
- Ember tetras: 6 to 10. At about 0.8 inches, they are the best match. Seriously Fish lists an 18 x 12 inch base (about 11 gallons) and a group of 8 to 10.
- Green neon tetras: 6 to 8, a small, neon-like alternative listed by Aquarium Co-op for a 10-gallon community tank.
Avoid larger tetras, such as black skirt, serpae, and rummy nose tetras. These need at least 20 gallons for a group of 6.
What Else Can You Keep With Tetras in a 10 Gallon Tank?
Keep the stocking light, because a 10-gallon tank has little room for error. A tetra school plus one centerpiece fish and a few bottom dwellers is a common pattern:
- One betta or one dwarf gourami as the centerpiece. Never keep more than one male, and remove the betta if it harasses the tetras. A dwarf gourami reaches about 3.5 inches, and males can be aggressive toward other gouramis and brightly colored fish.
- Pygmy corydoras as bottom dwellers: a group of 6 or more. They are about 1.2 inches and prefer soft, slightly acidic water.
- Nerite snails or cherry shrimp to eat algae. One or two nerite snails are enough for 10 gallons.
What Other Fish Fit a 10 Gallon Tank?
- Celestial pearl danios: about 0.8 inches. Seriously Fish suggests an 11-gallon base and larger groups (20 or more is ideal). A group of 6 to 8 works in a planted 10-gallon tank if you accept some shyness.
- Guppies: around 6, mostly females or one male to two or more females. They breed fast, so the population grows quickly.
- Betta fish: a single male. A female sorority needs at least 20 gallons.
- White cloud mountain minnows: they prefer cool water (about 57-72°F), so they don’t match tropical tetras. Seriously Fish also recommends a 14-gallon base and a group of 10 or more.
- Cherry shrimp: 10 to 20 in a shrimp-only tank.
Neon tetras stand out for 10-gallon tanks because they are affordable, peaceful, and widely available, and a betta is a popular companion for its color and fins. Don’t add large or territorial fish. A 10-gallon tank offers too little swimming space for them, which increases stress and conflict.
The invertebrates that suit a freshwater 10-gallon tank are cherry shrimp and nerite snails. Marine animals, such as sexy anemone shrimp, cleaner shrimp, peppermint shrimp, and clams, need saltwater and can’t live in a freshwater tank. Hermit crabs are not freshwater animals either.
Equipment Needed to Set up a 10 Gallon Aquarium
To maintain a 10-gallon tank and keep the aquatic species in the tank healthy, you need good lighting, filtration and heating, substrate and decorations, plants, stands, and lids.
Plants & Decorations
Plants and decorations are important for fish tanks because they replicate the fish’s habitat in the wild, providing places for fish to hide, explore, and claim their own territories.
Plants and decorations improve the tank’s appearance. Live plants take up nitrate and some ammonia, and they produce oxygen while the lights are on.
Good plants for a 10-gallon fish tank are Anubis, java fern, and java moss. Artificial plants are a low-hassle alternative to live plants, and also help to replicate the fish’s natural habitat — but unlike live plants, they don’t take up nitrate or ammonia.
Good decorations for a fish tank are caves, rocks, driftwood, and novelty decorations like miniature shipwrecks.
Lighting
Lighting is necessary for any fish tank to mimic the day-to-night cycle that fish experience in nature.
Run the light for about 8 to 10 hours a day and keep the tank dark at night. A timer makes this easy, and a regular schedule reduces stress and algae.
Special tank lighting isn’t essential if your fish tank is located in a room that gets plenty of natural light. However, if your aquarium contains plants, a standard fluorescent bulb on the underside of the lid will allow for healthier, quicker plant growth than natural light from a window.
Ensure the tank isn’t placed in direct sunlight, which will heat up the water and encourage algae growth.
Substrate
Sand or fine, smooth gravel mimics a riverbed and lets bottom-dwelling fish forage. Sand is best for corydoras, because it protects their barbels.
A dark substrate also makes the colors of small fish stand out and helps shy fish feel secure.
Choose a non-abrasive substrate, such as smooth gravel or sand. Both come in many colors, and either suits most small-fish setups.
Filtration and Heating
Most 10-gallon kits include a filter, but several don’t include a heater. Tetras and bettas are tropical fish, so buy an adjustable heater if the kit doesn’t have one.
Filters and heaters are essential for maintaining clean, temperature-regulated tank conditions.
Without them, the water temperature and water quality swing, which raises the risk of stress and disease.
Good filter types for a 10-gallon tank are sponge filters and small hang-on-back power filters. Choose gentle flow, since tetras and bettas don’t like strong currents. After setup, cycle the tank before you add fish. A fishless cycle often takes about a month.
Stands and Lids
A stand isn’t essential if the tank sits on a sturdy, level surface that can hold about 110 to 120 pounds, but a stand is the safer choice.
Stands add storage and are built to carry the weight of a full tank.
Lids are necessary for all fish tanks because they prevent dust and debris in the air from getting into the water and stop fish from jumping out of the tank.
A 20-inch lid fits most 10-gallon aquarium tanks. Many starter tanks come with an included lid, and some tanks are built onto a stand, helping you save money with an all-in-one purchase.
How to Choose a 10 Gallon Fish Tank
To choose a 10-gallon fish tank, consider your budget, the tank’s construction materials and quality, and your available space.
Construction Materials & Quality
Glass and acrylic (a clear plastic) are the two most common materials for fish tanks.
Glass is usually cheaper and resists scratching better than acrylic. However, glass is heavier than acrylic, comes in fewer shapes, and is more likely to crack on impact.
Price
There are several factors affecting the price of a 10-gallon tank, including the tank’s design materials and whether the tank features built-in equipment, like heaters, stands, lids, and filters.
If your budget is small, a glass tank is the better choice. Don’t cut corners on the filter and heater, because they keep your fish alive.
Space Available
The space you have in your home will determine the shape of the tank you buy and the size of the tank stand.
Your home or apartment should have space to house your tank away from direct sunlight, radiators, doors, or fireplaces.
If floor space is limited, a taller tank saves room, but remember that bottom dwellers need floor area.
Tank Shape
The shape of your fish tank affects the water’s depth and surface area. Tall, slim tanks have greater depth, but long, shallow tanks have more surface area, which improves gas exchange and keeps the water oxygenated.
If you have plenty of space available, consider the type of tank your fish would prefer. Bottom-dwelling fish need floor space, so they prefer a longer tank over a taller one.
Is a 10 Gallon Fish Tank the Right Size for Your Aquarium?
A 10-gallon tank suits you better than a 5-gallon tank if you’re planning to buy a school of 5 to 10 small fish.
A 10-gallon tank is a better choice than a 15-gallon tank if you plan to buy nano fish and you want to invest in a small, compact starter tank.
Skip the 10-gallon size if you want large or territorial fish. Also consider a 20-gallon long if you want a full school of neon tetras plus other fish.
10-gallon fish tanks are affordable, varied in size and shape, and easy to clean, making them ideal tanks for beginner aquarists who want to get started in fishkeeping with a school of small fish.
Frequently Asked Questions
How many neon tetras are in a 10 gallon tank?
6 to 8 is the usual answer, but it is a tight fit. Tetras need a group of at least 6, and Seriously Fish suggests a larger tank (about 14 gallons) and a group of 8 to 10. In a 10-gallon, keep the tank planted and well filtered, and don’t add a second schooling fish.
Why are neon tetras hard to keep alive?
Usually because the tank is too new, too small or too unstable. A 10-gallon changes water chemistry quickly, so cycle it for about a month before adding fish, keep up weekly water changes, and keep a group of at least 6 so the fish are not stressed. Neon tetra disease is also hard to treat once advanced, so quarantine new fish.
What tropical fish are good for a 10 gallon tank?
Small, peaceful fish: ember tetras, green neon tetras, neon tetras (borderline), celestial pearl danios, guppies, pygmy corydoras, and a single betta or dwarf gourami as a centerpiece. Cherry shrimp and nerite snails also suit the size. Skip larger tetras and territorial fish.
How big would a 10 gallon fish tank be?
About 20 x 10 x 12 inches (length x width x height) is the standard footprint. Filled, it weighs roughly 95 pounds, and 110 to 120 pounds with substrate and decor.
How many fish can you hold in a 10 gallon tank?
One school of 6 to 8 of the smallest tetras, plus one centerpiece fish and a few bottom dwellers, and then stop. A 10-gallon has little room for error, and heavier stocking leads to ammonia problems and stress.
Do fish prefer long or tall tanks?
Long. Bottom-dwelling fish need floor space, and long, shallow tanks have more surface area, which improves gas exchange and keeps the water oxygenated. A tall tank only makes sense if floor space at home is limited.
I am re-entering the hobby, and started with a 10 gal “starter” kit. Its been cycling for 4 weeks now. My wife is new to the hobby, and I got over anxious and put 3 guppies and a mystery snail in before I should have, and we lost one of the guppies. I have many years of experience, just not real recent, and I knew better, but wanted to impress her. Things are doing better now, the fish seem healthy and happy, and I’m looking forward to stocking my new tank.
I am concerned about properly cycling the used 20 gallon I’ll be getting. I am also getting used equipment (filter, heater, thermometer, lights, gravel). What steps should I take to ensure I am adding fish to a safe environment? I am considering one of two stocking options:
1- Albino Bristlenose Pleco, a male Betta, and a handful of Neon Tetras
2-Albino Bristlenose Pleco, Goldfish
Hi Brittany, you can clean the used tank with distilled vinegar and rinse it off with hot water. I’d rinse all the equipment under boiling water and it will be fine. A 20 gallon tank is the bare minimum tank size for a goldfish so you might just get away with option two. Thanks, Robert
Brittany,
We tried 3 neon tetras and a pleco with our male betta and the betta killed all of the other fish. Goodluck! Hopefully the betta you pick doesn’t eat his friends.
Hey Brittany! The betta option might work out better for you. Be careful with the betta however, it can potentially kill the other fish. I have a betta with an albino bristle nose and other than some attempted intimidation, they get along just fine. Add some plants and caves for the bristle nose and the tetras to provide them with some hiding places in case the betta picks on them. Also, if you can’t do life plants use silk ones to avoid tearing your bettas fins ☺️
Hi there, I got a bunch of used stuff with a 20 gallon tank also. I read every fishkeeping article I could find and then followed the instructions. I cycled my tank for 6 weeks and tested weekly. Then I added 1 whitecloud and watched him for a week. All was well so I slowly added 2 more, a drawf plec, neon tetras, 2 peppered cory cats, and some black skirts. I have lots of plastic and live plants.
I do 10% water changes every week or two.
Goldfish have a lot more waste and different water than tropical fish do and I would prefer your 1 choice! You will do great, enjoy!
I started the hobby recently with a 10 gallon. Everything was great until i changed the water too fast and killed all of my fish overnight. I waited a few days, did a ton of research and restocked the tank. I currently have a 10 gallon planted tank with one half moon betta , 6 pygmy cortadoras , 4 gold neon tetras and 3 harlequin rasboras. I also have 1 mystery snail and 1 ghost shrimp. Everyone is happy. Have done successful water changes as well. Im also currently cycling another 10 gallon and i think i mill move the neon tetras to that one. Not sure what else I will stock it with :) It is probably less work to have a bigger tank, but this has kept me busy during my seasonal depression and im really quite enjoying getting to learn all of the new things. Also, Brittany, I did do quite a bit of research regarding bettas and read that it is important to introduce the betta to an already established community. If you got the betta first, he might have just gone on defence mode. ( im not claiming this as a fact, im no expert)
I’m currently in the process of cycling my 10g tank and am pondering which fish to put in it. I’ve ready so many different thing about how many fish you can put into a 10g tank. Snt recommendations would be awesome. Were i live we only have a petland so kind of limited to what I have available to me.
I’m experiencing cloudy water right after I change the water in my 10 gallon tank.I have three 1.5″ goldfish and five white clouds, all less than 1″, and one 8″ live plant and a medium lava rock. Any advice?
Hi Dan, this tank is much too small for all those fish. For now, they’ll need to be in at least a 20 gallon tank, and eventually they’ll need a minimum 50 gallon tank. How long does the water stay cloudy after a change? Thanks, Robert
Hi there, I currently have a betta in a one gallon bowl, but I feel very strongly that my poor boy is bored, so I’m thinking of upgrading to the 10 gallon and adding some tetras. Any advice on the best way to introduce my betta into a community? I could also use some info on live plants in the aquarium because I would really rather have live plants than fill the whole tank with fake ones. Thanks.
My first tank was a 6.5 gallon I added two many fish and didn’t know what cycling was so I added three danios a cory two tetras and an algae eater the next day after set up and about a week later a Betta. 8 months later I still have one tetra a danio the beta and the Cory and they’re doing fine. I moved them to a ten gallon and the other tetra died soon after the move. just did my first serious water change yesterday and they’ve adjusted well. Every fish I’ve added since the beginning has died including a loach and another Cory. I’m hoping to add another fish today and plan to do better about my maintenance in the future. I feel really bad about the ones that died because it was my fault for not doing the research and I’m lucky any of my fish made it. I’m really attached now especially to the tetra and beta and I learned alot even if it was the hard way. I started another tank in the 6.5 gallon, a planted one and let it cycle for about a month before adding fish. Then I added two guppies a Betta and an amano shrimp and stopped while I was ahead. I’m thinking about another guppy because the two I have aggravate each other. Otherwise they’re all doing great because I know alot more about what im doing and I’m proud of my little community tanks. They really aren’t easy and if I knew what I know now I definitely would have started with a 20 gallon and maybe I’d still have most of those poor fish. The live plants make a difference too the Betta and shrimp love them and I do too I’m just confused on the co2 requirements. I’m glad I didn’t give up and plan to start a 15 gallon tank soon and can’t wait.
Any Ideas for a nice decor?
Any Ideas for a nice decor in a aquarium?
Hi Robert, I am wondering if 78 ° is too warm for a cold water 10 gallon fish tank? I bought a tank 3 weeks ago, let it sit for 1 week and then got 2 black-skirted tetras(?), This week i got 4 neons and 2 tiny angel fish. The guy at Petco said they all would get along. Is that true? Tonight i found 2 dead neons and one is missing. I’m depressed. I have water conditioner and living plants (2). Have i done something wrong? There were 2 dead tetras in the fish tank at the store . Thank you
Hi there. I’m looking for a lovely fish tank for my little girl and I’m going to stock betta only. What kind of fish tank should I buy?