Tap water is full of chemicals which can be very harmful to discus fish. It may be helpful for your healthy but the chemicals can be very damaging to your discus fish. This is why it is important that you monitor the water s chemistry every time you change the water in your discus fish aquarium. In most parts of the country, chlorine and chloramines are added to water supplies. This is to prevent them from getting lonely and also prevent them from getting aggressive against their own kind. Discus fish are shy types of fishes. This is why you also need to put some ornaments and plants inside the aquarium. These things will serve as a place to hide for your discus fish. Also, you have to remember that discus fish are quite sensitive to noise. For a pair of discus fish, a 27 gallon tank will suffice, but if you have more pairs, then you should get a bigger one, 75 gallons will do the trick for 3 to 4 pairs of discus fish. Do give your discus fish an area in the tank for them to spawn. Discus fish lay their eggs in a flat vertical surface area at the bottom of the tank. Keeping Discus Fish: It s all about the Water First of all, you have to keep in mind that discus fish are considered to be one of the most beautiful types of fishes that people love to have in their aquarium. The aesthetic quality of discus fish is really eye catching and once you are able to see one, you will surely want one as your own. Firstly though, don t be dissuaded when people say that discus fish keeping is difficult, frankly speaking it can be, but only to those who do not exert the effort to learn. But, in time, with proper research you will discover that discus fish keeping is very rewarding and easy. So here we go. You need to have an adequately sized tank. However, you need to keep in mind that although discus fish are considered to be high maintenance fish, you will find that there are other species that can also thrive with the discus fish. And, the best thing about these fish species is that they go along with discus fish and can really enhance the look of your discus fish aquarium.