With more discus fish in your aquarium, they will be less prone to misbehaving. You have to keep in mind that lonely discus fish tend to be aggressive to their own kind as well as to other species of fish. Getting a discus fish in groups will also ensure breeding, which will eventually increase the population of discus fish in your aquarium. If the quarantined fish do not show any signs of illness after two or three weeks in the quarantine tank, you can introduce them to the main tank. Also, you should keep in mind that discus fish thrives in tropical waters. So, keep the water temperature in your tank between 84 to 86 degrees Fahrenheit. Some Secrets with the Discus Fish Definitely one of the more attractive and popular fresh water fishes, the discus fish has been a mainstay in may aquariums all round the globe. Although the fish commands a high price, many people have sought its presence because of its beautiful patterns and color, and they are virtually easy to keep. Many homeowners which have aquariums in their houses swear to the fact that aquariums provides them with a sense of calmness, but of course, the fish inside the tank does a lot to make this happen. And one of the most sought after tropical freshwater fish today is the discus fish. A lot of discus fish owners today have seen the great potential in making money of their pets. This is because Angelfish can grow very large and can bully the discus fish. They may even outcompete the discus fish for food and they may also carry diseases that the discus fish are prone to catch. This combination is possible but it will require a much larger aquarium and also a skilled aquarist. Having the Right Tank for Your Discus Fish Most unlike dogs and cats, fishes can be deemed easy to keep. Even if you don t have a big backyard for your dog to play and exercise in, a good corner with about a meter or two of space is enough for you to have a relaxing aquarium to look at. You don t have to train them, and side from the occasional cleaning, they can be kept wherever they are already placed.