It may be hard at first but as you get more experience, everything will become routine and easy to do. The aquarium size is one of the most important things that you need to consider. Discus fish thrives in deep water. So, you may want to get a large tank that is both wide and deep. Discus fish can grow up to 6 or even 7 inches. After you understand the basics of keeping this kind of fish, you will see that it s quite easy to keep Discus Fish in your fish tank. First of all, you have to see to the water quality. In most cases, poor water quality is often the reason why people have difficulty in keeping Discus Fish. When it comes to water quality, try to think where the fish originated. You need to keep in mind that unlike other fishes that needs no specific water condition to thrive, discus fish will need to live in special tanks with water that is specifically treated to the point that it mimics their natural environment. By giving them the proper water condition they need to thrive, you can be sure that your discus fish will be able to live for a very long time and they will also be a lot healthier and more active. But, if you want to have an aquarium full of discus fish and want to save money in doing so, then you would just have to breed them yourself. Breeding discus fish is not as hard as you may think; it s not as simple either. There certainly will be some costs, but if you do it right, you will be saving money in the long run. Clear or white feces are hints that your discus fish may have internal parasites and that they are unwell and need attention. Also, you should observe their behavior. If your discus fish go on food strike, it s a clear sign that they are unwell. The color of their scales will also get darker, which is also an indication that the discus fish is sick. You should also always keep your tank clean and soft, keep away heavy metals and invest in a good filtration system or purifying unit. Keep the water slow moving and with temperatures between 82 to 86 degrees Fahrenheit. When adding other fish to your tank, make sure that your discus fish is the largest in the tank.