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Aquarium Size Requirements for Discus Fish

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  • Post last modified:21. May 2024

Ideal Tank Dimensions for Discus Fish

The ideal aquarium size requirements: While small to medium tanks are adequate for typical beginner species like guppies, swordtails, and plecos, the needs of larger fish, such as discus, necessitate more space. As fish size and stocking density increase, the demand for space also rises. It’s either advisable to reduce the number of fish or, preferably, to acquire a larger tank.

Discus fish can grow up to 20 cm in length and weigh around 300 grams, requiring a proportionate amount of water to thrive. A recommended aquarium size that aligns closely with these needs would be one measuring 130 x 60 x 60 cm (approximately 468 litres). While smaller aquariums are possible, the minimum should not be less than 120 x 40 x 50 cm (240 litres) or 100 x 50 x 50 cm (250 litres).

The depth of the aquarium is crucial—it should be at least 40 cm, though 50 or 60 cm is preferable, as it significantly enhances the fish’s ability to move freely. Historically, a depth of 40 cm was common when aquariums were designed to fit decoratively into wall units, but greater depth is more functional for the fish.

For beginners, a practical aquarium size starts at 300 litres (e.g., 100 x 50 x 60 cm or 120 x 50 x 50 cm) or even 360 litres (120 x 50 x 60 cm). In a 420-litre aquarium, you can comfortably keep up to 6 adult discus, with a minimum of 4. Such setups can also accommodate several beneficial catfish and companion fish.

For 300-litre tanks (100 x 50 x 60 cm or 120 x 50 x 50 cm), it’s feasible to maintain 4 adult discus, and in 360-litre tanks (120 x 50 x 60 cm), up to 6 adult discus along with some helpful catfish and companion fish can be managed.

In smaller tanks of 240 or 250 litres, you should only keep a pair of discus or a group of juvenile fish. However, bear in mind that such tanks require significantly more maintenance, particularly in terms of water changes. For a group of young fish, a substantial part will need to be rehomed or moved to a larger aquarium after a few months due to their growth and increased needs.

Key Points to Remember:

  • Adult discus requires ample space to thrive. The minimum tank size should be around 240-250 litres.
  • Depth is crucial: at least 40 cm, but ideally 50-60 cm.
  • For beginners, starting with a 300-litre tank is advisable.
  • Smaller tanks require more maintenance and may only support juvenile or fewer adult discus.

By adhering to these guidelines, you can ensure that your discus fish have the space and environment they need to grow and thrive.

Perfect Home for Your Discus Fish

Looking to create a stunning and thriving environment for your discus fish? Explore these top choices: the Diversa Aquarium Becken with a 300-liter capacity and dimensions of 120x50x50 cm, featuring 8mm thick glass for durability and clarity check it out on Amazon; the larger Diversa Aquarium Becken with a 450-liter capacity, measuring 150x50x60 cm, and constructed with 10mm thick glass for exceptional views and strength check it out on Amazon; and the spacious 576-liter aquarium, with impressive dimensions of 160x60x60 cm and a robust 12mm thick glass design, perfect for a spectacular discus fish display check it out on Amazon. Each of these high-quality aquariums offers the ideal space for your aquatic pets to flourish while adding elegance to any room.
Diversa Aquarium Becken, a 300-liter rectangular glass aquarium suitable for discus fish, measuring 120x50x50 cm with 8mm thick glass.
Discover the ideal aquarium setup for a stunning display of discus fish with the Diversa Aquarium Becken (120 x 50 x 50 cm).
Diversa Aquarium Becken, a 450-liter rectangular glass aquarium suitable for discus fish, measuring 150x50x60 cm with 10mm thick glass.
Create a spacious and beautiful home for your discus fish with the Diversa Aquarium Becken (150 x 50 x 60 cm).
A 576-liter rectangular glass aquarium, suitable for discus fish, measuring 160x60x60 cm with 12mm thick glass.
Transform your space with a magnificent discus fish habitat using this spacious 576-liter aquarium (160 x 60 x 60 cm).
Disclaimer: As an Amazon Affiliate, I earn from qualifying purchases.

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