For Discus Fish, the ideal water temperature is between 82 and 86 degrees F and the hardness should be between 3 and 15dH. The PH level should be between 5 and 6.5. These are the things that you need to remember about Discus Fish. By keeping these tips in mind, you can be sure that you will be able to maintain a healthy and happy Discus Fish swimming around in your aquarium. This will subject your discus fish with high levels of stress, which will eventually cause them to get sick. Discus fish needs clean water and good nutrition in order to thrive. When you are putting tap water in your aquarium, make sure that the water is treated first before you place the discus fish inside. Vary the diet of your discus fish. Aside from the flakes and granules, feed them blood worms or fresh or frozen brine shrimp as discus fish are carnivorous. Keep your aquarium in a quiet and solitary place. Too much noise and motion, like a door opening or heavy human traffic can cause them stress. Never overcrowd your tank. 50 percent of the water should be changed every week and you have to keep the water free from chlorine and heavy metals. To do this, a water purifier will be able to do the trick. Keep in mind that Discus Fish thrives in the Amazon River basin where the water is slightly acidic and soft. So, keep the PH level of the water lower than normal. These two is the water where they live in and the food they ingest. Another minor aspect that should also be kept in mind prior to owning a discus fish is the tank mates that your discus fish will have. Generally, it is recommended that the discus fish should be the largest fish in the tank. It has always been said that prevention is better than cure, so knowing what signs to look out for to determine whether there is something wrong with the tank or with your discus fish. When it comes to their food, discus fish can be fed with aquarium foods. You can feed the discus fish with frozen bloodworms and brine shrimp. Adult discus fish can be fed once a day but juvenile ones should be fed at least 3 times a day. These are some of the factors that you need to know when you plan on caring for discus fish.