Live aquatic plants
or plastic plants
are great additions for landscaping and providing hiding areas for the discus fish. Keep in mind discus are omnivorous and they will eat both plants and meat, so you should feed them a variety of foods that will provide them with the nutrients they require. Remember discus fish need plenty of room to swim, and there should be a number of plants for them to hide in.
Live aquarium plants will help keep the water oxygenated and keep down the levels of nitrites and ammonia in the water. This is something plastic plants are unable to do. Discus fish enjoy having plants to hide in, particularly if they are breeding. Your discus will be happiest with plants that require little maintenance on your part, as the fish can become agitated if you are frequently invading their habitat. Any plants in the tank should require minimal maintenance so that you can avoid disturbing the discus.
Since your discus fish tank will have warmer water in comparison with aquariums used to raise other types of fish, you must choose plants that will thrive in warm water. Live plants such as Java ferns
and Amazon Sword Plants
both grow well in warm water tanks, as do plants in the Echinodorus family. A few tall, thin plants will help create a nice landscape for your discus fish and complement each other.
Before putting discus fish in a tank, it should be well cycled and plant life should be established or artificial plant should be in place.