What aquatic plants are suitable for discus fish?

Discus fish are considered the kings of the aquarium – beautiful, sensitive, and with specific demands on their environment. To ensure discus fish feel completely at home, the aquarium planting should also be tailored to their needs.

Why is selecting the right plants so important?

Discus fish do not like it too bright. A brightly lit aquarium stresses the animals, which is why plants that can cope with less light are particularly suitable.

Furthermore, a CO₂ system is not recommended for discus aquariums: discus fish need very oxygen-rich water, and too much CO₂ would have the opposite effect – it could even harm them. Therefore, species that grow healthily even without additional CO₂ fertilization are required.

Suitable Plants for the Discus Aquarium

1. Foreground and Epiphytic Plants

  • Anubias species (e.g., Anubias barteri, Anubias nana)
  • Microsorum (Java fern)
  • Bucephalandra
  • Cryptocorynes

These plants also grow in less light, are robust, and do not require CO₂ fertilization. Since they are often attached to roots or stones, they can be flexibly placed and create great focal points.

2. Background Plants

  • Vallisneria
  • Echinodorus species
  • They grow tall, provide a beautiful background, and add structure. Vallisneria spreads via runners, while Echinodorus species form impressive solitary plants. Both groups are very adaptable and tolerate the higher temperatures (28–30 °C) that discus fish require.

3. Floating Plants

  • Frogbit (Limnobium laevigatum)
  • Water spangles (Salvinia natans)

These plants are a real bonus in the discus tank: they provide shade, thus dimming the light, and they grow very quickly. In doing so, they remove nitrate, nitrite, and phosphate from the water – substances that are harmful in too high concentrations. Thus, floating plants actively contribute to improving water quality.

Conclusion.

For discus fish, robust, easy-care plants with low light and CO₂ requirements are particularly suitable. With a combination of epiphytic plants, background plants, and floating plants, you create a natural environment that is both visually appealing and meets the needs of your fish