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Number of Discus Fish vs Tank Gallon Size [Complete GUIDE]

The freshwater discus fish is a popular aquarium fish because of its beauty and rarity. Their varied colouration, patterning, and refined appearance make them a welcome addition to any fish tank. Remember that discus fish have particular needs regarding tank size and water quality. In this article, we will provide a detailed tutorial on figuring out which dimension tank is best for your discus fish and how to set up their habitat correctly.

Discus Fish Tank Size Guide: How Many Discus Fish Can You Keep in my aquarium?

Despite the fact that a single discus fish can remain alive in a 10-gallon tank, they thrive better in groups and expand their space needs accordingly.

As a general rule of thumb, a 100-gallon aquarium can house 15 discus fish, a 60-gallon tank can hold 9, a 75-gallon aquarium can hold 11, a 50-gallon aquarium can hold 7, and a 20-gallon aquarium can hold 2.

A discus fish is typically 4.5 to 6 inches in length, but it can reach a maximum size of 9 inches.

On average, they have 10-15 years of life span.

The well-being of these stunning fish depends on careful filtration and constant attention to water quality. With the right room and care, you can make your discus fish feel comfortable and thrive.

Minimum tank size for discus fish

Discus fish are highly sociable, group-oriented fish that do best in communities of at least five to six individuals. With greater room to swim and cleaner water, a 55-gallon tank is a minimum requirement for a school of four to six adult discus fish.

Discus fish are picky eaters, so a well-planted aquarium with hiding spots and territories is essential, and a 55-gallon tank would give you more room to do just that.

Discus Fish: Minimum Tank Size and Types

Aquarists love discus fish for their beautiful colours and graceful motions in the tank.

Discus fish come in a wide range of colours and patterns, with blue, brown, green, Heckel, red turquoise, blue diamond, and pigeon blood among the most common.

In order to properly house a group of 4–6 of these fish, a tank volume of at least 55 gallons is required.

How many discus fish are in a 3-gallons tank?

A 3-gallon tank is not recommended for keeping discus fish. Minimum tank size for keeping discus fish is 55 gallons. If you don’t have enough room/tank to accommodate discus fish, don’t try to endanger their life in small tanks. You can keep guppies in a 3-gallon tank.

Keep reading: Number of Guppies vs Tank Gallon Size [Complete GUIDE]

Factors to Consider When Determining Tank Size for discus fish

A few considerations exist when deciding the best tank size for your discus fish. Fish characteristics include physical dimensions, activity levels, and social interactions with other fish.

Size of the Fish

Discus fish typically grow from 4-6 inches, and a 10-gallon tank is enough for a single fish, but they like to dwell in a community of 5 fishes per tank minimum so the 55-gallon size of the tank should be taken as a minimum to adjust 5 to 6 discus fish.

Aggression level

Discus fish are very peaceful; they don’t have disputes for territories and have deficient aggression levels. Still, for factor safety, you need to have proper supervision of the tank to have a large amount of discus fish in a tank.

Discus fish compatibility with other fishes:

Ideal Tank mates of Discus fish:

When choosing tank mates for discus fish, selecting fish that can tolerate the same water conditions and are not aggressive or territorial is important.

Tetras, rasboras, and corydoras catfish are all examples of peaceful community fish; so are discus fish, which are similar to discus fish in size and temperament; plecos, which can help keep the tank clean by eating algae; and dwarf cichlids like Apistogramma and Mikrogeophagus, which can add colour and variety to the aquarium.
The discus fish should not be kept with any known aggressive or fin-nippers, such as barbs and several species of gouramis. Furthermore, it is recommended not to overload the aquarium since doing so can lead to poor water quality and the discomfort of the fish.

How many discus fish are in a 10-gallons tank?

A 10-gallon tank is not recommended for keeping discus fish. Minimum tank size for keeping discus fish is 55 gallons. If you don’t have enough room/tank to accommodate discus fish, don’t try to endanger their life in small tanks. You can keep Endlers in a 10-gallon tank.

Keep reading: Number of Endlers vs. Tank Gallon Size (Complete GUIDE)

Setting Up the Ideal Environment for Discus Fish

After settling on a tank size just right for your discus fish, creating an atmosphere as close as possible to their original habitat is time. This includes giving them places to hide, a foraging-friendly substrate, and a clean environment in which to live.

Hiding Places

A more natural and peaceful atmosphere can be achieved by giving them plenty of places to hide.

Your discus fish will appreciate the natural atmosphere you create with the help of live plants, pebbles, and driftwood.

Substrate

while natural explorers, discus fish, need a substrate that doesn’t restrict their movement while they look for food. A sandy or fine-gravel ground is advised to simulate their natural habitat best and encourage natural browsing behaviour.

Plantation

Ensure you have enough plants in your tank to absorb the carbon dioxide, nitrate, and other toxic waste from the fish excretion.

Discus fish can survive on their own with just plants and pests. So plantation is essential.

Filtration

To grow, discus fish need clean, well-filtered water. High-quality canisters or power filters with a flow rate of 6-8 times the tank volume per hour are recommended. To keep your filter running, choose and maintain one that fits your tank.

Heating

Discus fish need a steady and warm water temperature of 82-88°F. A high-quality submersible heater that fits your tank is crucial. To maintain a stable temperature, check the temperature using a thermometer and make adjustments.

Lighting

Discus fish do not require intense lighting and may even prefer low to moderate levels of light.

Use LED light which can save electricity as well as give you proper lighting.

Water Quality

Discus fish flourish in a certain set of water parameters. They prefer a pH range of 6 to 7, a water hardness of 2-8dGH, a salinity of 1.020 – 1.024, and an 82 to 88 degrees Centigrade temperature range.

It is critical to keep water parameters consistent by making regular water changes and monitoring the tank’s water chemistry. Using a high-quality filter can also assist in maintaining.

Keep reading: How to Naturally Lower PH in Aquarium.

How many discus fish are in a 15-gallons tank?

A 15-gallon tank is not recommended for keeping discus fish. Minimum tank size for keeping discus fish is 55 gallons. If you don’t have enough room/tank to accommodate discus fish, don’t try to endanger their life in small tanks. You can keep Cory catfish in a 15-gallon tank.

Keep reading: Number of Cory Catfish vs. Tank Gallon size [Complete GUIDE]

Discus fish in a glass bowl

Keeping Discus fish in a glass bowl is not advised since this can harm their health.

Discus fish can only flourish in conditions where they have plenty of room to swim, good water quality, and enough filtration.

Fish kept in glass bowls may suffer from poor water quality and other health problems due to the bowls’ tiny size, lack of filtration, and inadequate aeration. In addition, Discus fish are curious, active fish that benefit from having lots of room to swim around in.

This is why it’s crucial to supply your Discus fish with a clean, well-maintained tank of the appropriate size.

Single Discus fish in a tank

Discuss fish like to live in the form of a community, so they don’t like to live alone. A minimum of 5-6 discus fish should be placed in a single container.

The male-to-female ratio of discus fish in a tank

If you want to have both sexes in your tank, you will follow the 1:2 rule. That is one male and two females, i.e., In the 55-gallon tank, keep a maximum of two males with four or three females because males chase the female and harass her when she is alone or one in number.

Breeding of Discus Fish

Breeding discus fish is pleasant but difficult. Discus fish breeding tips:

  • Select a breeding pair: Discus fish establish monogamous partnerships and reproduce. Healthy, mature, and same-sized pairs are best.
  • Set up a 20-30-gallon breeding tank
  • pH of 6.5-7.0 should be maintained in the breeding tank.
  • 82-86°F water temperature is ideal in the breeding tank.
  • Before breeding, feed the breeding couple bloodworms, brine shrimp, and daphnia. This will keep them healthy.
  • Discus fish place their eggs on a breeding cone or slate. Breeding tanks need spawning sites.
  • Before the female lays her eggs, the male cleans the breeding cone or surface. Parents would alternate guard and fan the eggs after spawning to prevent fungal growth.
  • After hatching, the fry will eat the parents’ slime coat for a few days before switching to live baby brine shrimp or powdered fry food.
  • Maintain high water quality and execute regular changes during breeding to keep the breeding pair and their offspring healthy.

Diet of Discus fish:

Pretentious foods are highly recommended for the diet of discus fish.

Blood worms, Brine shrimps, and Daphnia are the favourite foods of discus fish.

Frozen foods can also be given to discus fish but not in high quantity.

Number of discus fish in different kinds of tanks

How many discus fish are in a 20-gallons tank?

A 20-gallon tank is good enough for keeping two discus fish. But it is recommended to use discus fish is 55 gallons because they are more comfortable living in a community. If you don’t have enough room/tank to accommodate discus fish, don’t try to endanger their life in small tanks. You can keep Cory Bettas in a 20-gallon tank.

Keep reading: Number of Betta vs Tank Gallon Size [Complete GUIDE]

How many discus fish are in a 25-gallons tank?

A 25-gallon tank is good enough for keeping two to three discus fish. But it is recommended to use discus fish is 55 gallons because they are more comfortable living in a community. If you don’t have enough room/tank to accommodate discus fish, don’t try to endanger their life in small tanks. You can keep Neon Tetras in a 25-gallon tank.

Keep reading: Number of Neon Tetras vs. Tank Gallon Size [Complete GUIDE]

How many discus fish are in a 30-gallons tank?

A 30-gallon tank is good enough for keeping two to three discus fish. But it is recommended to use discus fish is 55 gallons because they are more comfortable living in a community. If you don’t have enough room/tank to accommodate discus fish, don’t try to endanger their life in small tanks. You can keep Glofish in a 30-gallon tank.

Keep reading: Number of Glofish vs. Tank Gallon Size [Complete GUIDE]

How many discus fish are in a 75-gallons tank?

A 75-gallon tank is good enough for keeping seven to eight discus fish. It is good enough to maintain and breed a large amount of discus fish in a pleasant environment.

If you are an aquarium explorer and want to have fun in your aquarium, You can keep cichlids in a 75-gallon tank.

Keep reading: Number of Cichlid vs. Tank Gallon size [Complete GUIDE]

How many discus fish are in a 100-gallons tank?

A 100-gallon tank is good enough for keeping ten to twelve discus fish. It is good enough to maintain and breed a large amount of discus fish in a pleasant environment.

If you are an aquarium explorer and want to have fun in your aquarium, You can keep mollies in a 100-gallon tank.

Keep reading: Number of Mollies vs. Tank Gallon Size [Complete GUIDE]

How many discus fish are in a 125-gallons tank?

A 125-gallon tank is good enough for keeping thirteen to fifteen discus fish. It is good enough to maintain and breed a large amount of discus fish in a pleasant environment.

If you are an aquarium explorer and want to have fun in your aquarium, You can keep mollies in a 125-gallon tank.

Keep reading: Number of Mollies vs. Tank Gallon Size [Complete GUIDE]

Conclusion

  • The health and happiness of your discus fish depend on you providing an environment that’s just right for them.
  • While a single discus fish can accommodate easily in a 10-gallon tank, a school of 4-6 should have at least 55 gallons.
  • In addition to clean water and effective filtration, a properly planted aquarium with plenty of hiding places and territory is essential for discus fish.
  • When deciding on the optimal tank size, it’s also essential to consider the fish’s size, aggressiveness, and compatibility with other tankmates.
  • These graceful fish can thrive in the right conditions for 10–15 years.

Q/A Session

What size tank do I need for 10 Discus fish?

For 10 Discus fish, a tank volume of 100 gallons (378 litres) is recommended. These fish can get rather large, so they need lots of room to swim and a constant water temperature and pH. The reduced concentration of waste and contaminants in a larger tank is another benefit to preserving water quality. No matter how big your tank is, it’s crucial to remember that regular water changes and good filtration are necessary for the fish’s health.

Can you keep discus fish in a 200 Litre tank?

200 litres are approximately 53 gallons recommended to keep 5-6 discus fish.

Can I keep two Discus fish in a 10-gallon tank?

A 10-gallon tank is enough for a single discus fish, but single discus will die because of stress and loneliness. They like to live in a community which contains a minimum of 5 discus fish. A 55-gallon tank is highly recommended.

Can I keep the discus fish in 100 Litre tank?

One can easily accommodate a pair of discus fish in a 100-litre tank (26gallon) but please read the above question and answer first.

Will discus fish eat smaller fish?

Normally they don’t eat small fish, but occasionally they can rely on small fish for their food. Blood worms, Brine shrimps, and Daphnia are the favourite foods of discus fish.

What is Discus fish’s favourite food?

Blood worms, Brine shrimps, and Daphnia are the favourite foods of discus fish.

They like protein enriched foods.

In the aquarium, you can add frozen foods for their nourishment.

What fish can mix with discus?

Neon Tetra, Siamese Algae Eater, Harlequin Rasbora, Cardinal Tetra, Pencil Fish, Pleco Fish, Dwarf Gouramis, and Rummy Nose Tetra.

Is rainwater good for discus fish?

Because of its unpredictable quality and composition, using rainwater for discus fish can be challenging. While rainwater is mostly safe to drink, it may become polluted if it comes into touch with dirt or other impurities before being collected.

The following issues are there in rainwater for discus fish:

  • Unfavourable pH level, Hardness and temperature.
  • Lack of essential minerals
  • Industrial pollution, airborne chemicals, and runoff from surrounding buildings and rooftops are just a few sources of pollution that rainwater may pick up.

If you want to use rainwater, the following precautions should be taken:

  • Filtration
  • Purification
  • Testing of water quality
  • Mineral supplementation.