For adult Discus Fish, you will need to feed them two to three times a day. Also, make sure that clean any uneaten foods as these things will secrete ammonia which can eventually increase the PH level. Remember these things and you can be sure that you will be able to keep your Discus Fish alive and healthy. Also, with larger tanks, maintaining water quality is a lot easier than smaller tanks. And, you have to keep in mind that Discus Fish are rather sensitive when it comes to water quality. Water quality is very important if you plan on keeping a Discus Fish. Try to keep the water clean and also its chemistry stable. As for their food, you should ask the store clerk what food they have been accustomed to. Discus fish can be picky so you need to ensure that you can, maintain the food that they usually eat. Make sure though to never overfeed your fish. The extra food will just become dirt inside the tank. For younger discus fish, you should feed them about four times daily, older fish only needs to be fed twice a day. Always keep in mind that water chemistry is always important when you consider taking care of these types of fishes. They are very sensitive to water chemistry and you have to be able to make sure that you provide them with the proper water chemistry in order for them to live comfortably in your aquarium. Captive fish or store bought discus fish can survive in harder water and acidic levels that can reach 6.8. They are already used to this. But for breeding purposes, stick to the natural levels that discus fish are used to. If the temperature and the acidic level falls, there will be a good chance that your discus fish will not breed and in certain cases, they can even die. Several Tips to Take Care of Your Discus Fish Discus fish are considered to be one of the most beautiful types of fishes that you can keep as pets in your aquarium. However, you will find that keeping them can present you with a challenge. You have to remember that discus fish are very sensitive when it comes to the water quality they live in as well as the food you feed them.