These are the things that you need to remember when you are planning to keep discus fish as pets. 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. If you want to save some money, but you can t really be sure tht they would breed, is to buy baby discus fish, about six to eight of them. You can just hope that at least one or two of them are male or female. Typically though, there would be one of the opposite sex, so you would just have to wait until they grow up. 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. The acidity of the water should also be kept at a constant level. Even if you don t have a big backyard for your dog to play and exercise in, a good corner with about a meter or two of space is enough for you to have a relaxing aquarium to look at. You don t have to train them, and side from the occasional cleaning, they can be kept wherever they are already placed. This is to prevent them from introducing bacteria, parasites, as well as other types of diseases that can be transferred to other fishes inside the main tank. If the quarantined fish do not show any signs of illness after two or three weeks in the quarantine tank, you can introduce them to the main tank. 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.