First off, you need to make sure that you have a pair, a male and a female discus fish, that is the most obvious part. To go about it, there are three viable options for you, but to be honest, some of these options may not be the best way to do so. Here are your options: First, is to buy young discus fish, bout six to eight of them. You need to make sure that you have the right fish tank for breeding discus fish. A 20 gallon fish tank is great for breeding as this will give you enough space for both the mating pairs to swim around and breed. 20 gallon fish tanks are perfect for 2 pairs of discus fish. But, if you are planning to breed several pairs, a larger fish tank may be needed. Unlike other types of freshwater fish that you will often see in retail chains, Discus Fish will require you to pay close attention to them in order to keep them healthy. But, you shouldn t let this fact intimidate you and scare you from owning this kind of fish. With the right knowledge, you will be able to maintain this beautiful fish for many years to come. Any more acidic or alkaline than these numbers is a sure way to kill your discus fish. Lastly, the water hardness should also be considered. Although discus fish are not that sensitive to water hardness, it will play an important role in keeping them healthy. The optimum hardness of water for discus fish to thrive in should be between 1dH and 8dH. Although most internal parasites in discus fish may not cause serious threats, you have to remember that these parasites can eventually grow uncontrollably, which can cause serious problems for your fish. A symptom of discus fish having internal parasites is that they may produce white feces. Emaciation can also occur and is also considered as a common symptom of internal parasite. However, before you actually buy your first batch of discus fish, you need to keep in mind that you first need to understand the fish as well as their environment in order for you to successfully keep discus fish as pets and also keep them healthy and happy for a long time. First of all, you have to keep in mind that discus fish originated in the Amazon River basin.