It s never easy to find the sex of an animal when they are small, especially when they are fishes. Fishes tend to be fast and moving all the time. So this may cause a lot of problem. But, if you are determined to become a breeder, then use these tips to help you out. Determining the gender of your discus fish will help you to pair them equally. Discus fish are quite expensive and you wouldn t want to buy one if you don t know how to take care of it. So, here are some of the basic fish care tips that you need to follow in order for you to properly take care of discus fish in your aquarium. First off, many people think that discus fish are only for advanced fish keepers. By increasing the water temperature, you also need to increase water aeration to keep the oxygen level up. You can also combine heat treatment with Metronidazole, which is administered orally. Give this medication to your discus fish once every 3 days. Usually, discus fish will respond well to heat treatment in combination with the medication treatment. 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. Basically, they will need extremely clear water and you also have to maintain the temperature as well as the pH level of the water at a constant level. Also, you need to monitor the quantity of heavy metals, nitrites, nitrates, and ammonia in the water. It is highly recommended that as a discus fish owner, you need to use a reverse osmosis filtration unit inside the fish tank where you keep the discus fish. Normally, they can grow to about six or seven inches. Make sure that they have adequate space for each discus especially when they are breeding. If in a cramped space, this can lead to fighting and injuries. You may add some ornaments in your tank. Although they can survive without them, ornaments wont only make your aquarium look good, but they can also provide shelter for them for their protection and for their spawning.