You have to keep in mind that juvenile discus fish can be aggressive when it comes to eating. However, as they grow up or mature, you will find that their eating behaviors will start to change and they will also start to become graceful. You also have to remember that discus fish likes to live in groups. In their natural home, discus fish usually thrives in water with temperatures between the range of 28 and 31 degrees Celsius. Any higher or lower than these temperatures will be enough to kill the fish or not let them survive for long. This is why you may want to invest in a water thermometer in order for you to constantly monitor the water so it won t exceed or drop below the required temperature. You have to keep an eye on the mating pair as you will need to move them in to the breeding tank. In order for the breeding to be successful, you have to get a separate tank for the breeding pair. By getting a separate breeding tank, you will free the breeding pair from stress. Just remember to maintain the PH level of the water in the breeding tank stable and you also have to remove leftover foods to avoid wreaking havoc to the quality of water. When you are setting up your discus fish tank, it is important to remember that you have to add a water conditioner in the tap water, which you will doubtlessly use. 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. However, these foods may carry parasites and bacteria that can infect your discuss fish. So, be careful when feeding worms to your discus fish. You should also keep in mind that discus fish are very reactive with their environment. So, place the aquarium containing discus fish in an area in your home that doesn t receive a lot of traffic. And, as you can imagine, chlorine is a chemical that is not good for discus fish. Today, there are available test kits that you can use to test the water if these chemicals are present in the water and also how much of it is present in the water. Water conditioning is the process of removing these chemicals from the water.