You want to avoid putting smaller peaceful fish next to the Oscar fish as they will become prey quickly. Other species you should consider their natures and see if they are appropriate as tank mates for As a result you need to make sure you select your tank mates and the tank itself quite carefully.

Also try to avoid having other smaller animals in the tank like the smaller invertebrates shrimp snails and other similar creatures.

Oscar fish Unfortunately as docile as oscar fish are around humans they can be relatively aggressive when raised in a tank. Opting for a larger tank can reduce some issues related to aggression try to keep a tank that is at least 75 gallons in size. The key to keep oscar fish together with other tank mates is to have a huge tank have various types of fish and add hiding places. Keeping multiple aggressive fish together will make them not pick on one individual fish but their aggressive will spread out towards all tank mates and will not cause problem to one individual fish A 150 gallons tank ensures that the oscar fish and its tank mates have enough oxygen. Furthermore it averts them from experiencing stress. However you might need a bigger tank if you decide to raise oscar fish with arowana. Arowana is a big fish and you have to get a tank that can accommodate its size. Stick to 5 or 10 fishes only But as oscar fish grows bigger you will have to move the other small fish or your oscar to a separate tank. Or else they will most likely get eaten by the oscar.

Oscar fish grows very fast. It can grow at a rate of 1 inch per month. And generally it grows up to 12 inches but if you take good care of it then it can grow up to 15 inches as well While finding suitable tank mates for oscars can be difficult providing a healthy diet isn t. They are omnivores and are going to eat just about anything you give them. Small fish larvas and small pieces of plant debris would be eaten in the wild. Small insects and crustaceans would form the bulk of their diet. Most of the fish i am going to recommend as tank mates will require a minimum of 50 gallons just for themselves not including the oscar. Choosing tank mates that are suitable. Remember that you can t put any fish in with an oscar you ve got to choose fish that will be able to live in harmony with your oscar. Furthermore silver dollars are regularly used as dither fish i.e.

Fish types that reduce stress for its nervous or aggressive tank mates by swimming as a group in the middle of the tank. While silver dollars are incredible oscar tank mates you ought to never keep them in groups of less than 3 or 4. If you must keep other fish with your oscars be sure you have plenty of tank space and avoid selecting tank mates that are significantly smaller than your oscars. Oscar fish are best kept with similarly-sized species such as larger characins some of the more robust cichlids as well as larger cyprinids clown loaches eels and Black convicts are small in comparison to oscar. They are also aggressive and tough enough to take the occasional chase. Firemouth are shy in nature and not as bold as convicts. But they are compatible tank mates for your oscar. Dempseys are also the good tank mates for your oscar. They are medium in size.

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