Aside from the pellets and granules, you can also feed the breeders bloodworms and brine, fresh or frozen as discus fish are carnivorous fishes. Do keep their habitat livable. This means maintaining the temperature and the pH level of their water. Discus fish tend to get stressed when the water experiences an abrupt change or if its dirty. 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. So, you may want to put them in a place in your home where there is less traffic and less noise. 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. This is quite advantageous and will make it easier for you to maintain the quality of water but they are not really considered as a necessity. You have to remember that reverse osmosis filtration unit cost a lot of money. And, if you are just starting out raising discus fish, you will see that the price of this kind of filter is enough reason not to put one in your 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. Also, you should keep in mind that discus fish thrives in tropical waters. So, keep the water temperature in your tank between 84 to 86 degrees Fahrenheit. So if you plan on buying a smaller tank know and just upgrading to a bigger one later on, you may find that this would be futile. You would just be spending more in a short period of time. A small tank will just stunt their development and will stress them out. But also remember, if the tank is too big, the young discus fish can become overly skittish and can also stunt their growth.