They need security of a school around them and getting them in groups will help in reducing their stress levels and also help in keeping them happy. Another advantage of keeping them in groups is that you are actually increasing their chances of mating and breeding and produce more discus fish, which you can keep or even sell for profit. So, make sure that you have at least 6 discus fish swimming around in your aquarium in order to keep them happy and prevent them from getting lonely. 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. By giving them the proper water condition they need to thrive, you can be sure that your discus fish will be able to live for a very long time and they will also be a lot healthier and more active. The temperature of the water must be kept stable. In their natural home, discus fish usually thrives in water with temperatures between the range of 28 and 31 degrees Celsius. 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 will do the job in taking out the chlorine as well as other chemicals present in the water. Keep in mind that discus fish thrive in softer water. If your tap water is filled with chemicals, then the fish will not survive that long. You also have to remember that discus fish likes to live in large areas of water. But many homes today do have fish tanks and they are not just for ornamental or design purposes. Yes they do look good, that is a given. Fish tanks and the fish themselves are also effective stress relievers. That s why many people today would rather own fishes. And one of the fish breeds that many aquarists choose is the discus fish.