Generally, it is recommended that the discus fish should be the largest fish in the tank. It has always been said that prevention is better than cure, so knowing what signs to look out for to determine whether there is something wrong with the tank or with your discus fish. To be honest, it s much more bothersome to be treating illness rather than just plainly keeping a routine of maintaining a clean tank, at least you can put it in your schedule. 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. Some use certain plants while some say that an overturned pot will do. Do vary the diet of your discus fish. When your fish are breeding, a varied diet is important to boost their reproductive system upping their chances of spawning. 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. You need to know that Discus Fish are great breeders and in some instances, you will see that they will breed in your tank without you even knowing about it. To start the breeding process, you may want to purchase a breeding pair. The dealer of the Discus Fish will be able to give you some options and pricing information to get you started in the breeding of Discus Fish. They may even outcompete the discus fish for food and they may also carry diseases that the discus fish are prone to catch. This combination is possible but it will require a much larger aquarium and also a skilled aquarist. Another great fish that can complement your discus fish is the Blue Ram, which is a beautiful dwarf cichlid. Tips on How to Determine the Gender of your Discus Fish Its typical for any respectable aquarium owner to breed their fishes. This not only cut down on costs of purchasing new fishes, but they also pose a good challenge in growing an aquarium. So, many breeders tend to ask how they will be able to determine the gender of their discus fish.