This is why you have to consider the size of the tank where you intend on keeping your Discus Fish. You have to try getting the largest aquarium that you possibly can in order for you to easily maintain the water quality. You may already know about the nitrogen cycle. You need to consider the fact that this is very important whenever you intend on keeping any kind of fish in a fish tank or aquarium. This is to ensure that the water chemistry is correct for your discus fish to thrive or live in. You need to remember that sudden change in water chemistry can eventually lead to high stress levels for discus fish. And, if your discus fish is constantly experiencing stress, they will be more likely to get diseases and even die. If you don t know how to keep a Discus Fish, then you have to first educate yourself how in order for you to continue enjoying having this fish in your aquarium for many years to come. Of course, like with other pets, you want your Discus Fish to be healthy and free from disease. So, here are some simple tips that will help you keep your Discus Fish alive and healthy for a very long time. You have to remember that Discus Fish are very temperamental creatures. They are very sensitive when it comes to water quality as well as with the food you feed them. 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. 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. As a fry, it is hard to determine the sex of the discus fish. So this is mostly a hit and miss affair. During spawning, you will notice that the breeding tube of the male discus fish tends to be smaller and sharper, with the female, the breeding tube will be rounder, and broader. The breeding tube can be found between the anal fin and the anus. Some breeders say that the female discus fish have a more vibrant color, but there are fewer patterns.