When it comes to feeding, make sure that you don t over feed them. By ensuring these things, you will see that your discus fish will grow healthily, which will essentially mean good color development. Always keep in mind that before you actually purchase a discus fish and place them in your aquarium, make sure that you know how to take care of them and make sure that you are responsible enough to care for them. However, before you start to attempt raising discus fish, it is important to know that discus fish can be quite hard to keep especially for people who are just starting out in this kind of hobby. You need to remember that discus fish are temperamental creatures that need special care. They are very sensitive when it comes to water quality as well as food quality. However, the problem with discus fish is that they are very hard to maintain. You need to have the proper aquarium setup in order for you to successfully raise them and even breed them. You have to remember that discus fish are very sensitive animals that need to be watched constantly. 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. This means that in their natural environment, they will constantly seek food. This is why you should try feeding your discus fish a few times each day. However, you may want to prevent over feeding them. The rule in feeding discus fish is to not feed them more than 5 times a day and less than 3 times a day. 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. 3 inches would be the best size to buy them. But, the odds are that in those six to eight young discus fish, you will be able to get at least a pair or two. The best thing about this option is that at this age, the discus fish doesn t command a high price yet. It will take some time though before you will be able to discover if you have hit the jackpot.