The water temperature, acidity, and hardness should be stable enough and it should mimic the water in a discus fish s natural environment. You should also keep the water clean. So, try to change 50 percent of the water at least once a week and make sure that whenever you feed your discus fish, you need to clean or remove uneaten fish food. To many, this relieves stress effectively. So if you plan on getting some discus fish or have already purchased some, here are some tips on how to keep the environment suitable for the discus fish. Firstly though, don t be dissuaded when people say that discus fish keeping is difficult, frankly speaking it can be, but only to those who do not exert the effort to learn. However, the problem with keeping discus fish is that they are quite difficult to take care of. You see, there are several factors that you have to keep in mind when you plan on taking care of discus fish as your pet. Basically, taking care of discus fish is not that hard. Although first timers will find it difficult to care for discus fish, you will soon get the hang of it and start taking care of discus fish easily. 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. Another great fish that can complement your discus fish is the Blue Ram, which is a beautiful dwarf cichlid. If you don t know yet how to maintain the temperature and pH levels of your tank water, then it is not recommended for you to own a discus fish yet. Try to learn more first about maintaining the livable balance of your tank water so that your investment will not go down the drain. This is why raising discus fish is not recommended for inexperienced aquarists. You also have to keep in mind that the hardness and acidity of water is also important. You need to be able to mimic the waters of the Amazon River in order for you to properly care for your discus fish. This means that the water should have an acidity level of pH 6 and it should also be soft water. These are the things that you need to remember when you are planning to keep discus fish as pets.