Oscar fish, also known as Astronotus ocellatus, are cichlid fish species that originate from South America. Oscar fish grow at an extreme rapid rate. Understanding the growth rate of Oscar fish will help you to determine the amount of space that you will need to providing for your Oscar fish.
People often purchase Oscar fish when they are young, but Oscar fish tend to outgrow there tank very quickly. Therefore, you will have to provide tanks and equipment for Oscar fish that can accommodate there rapid growth. The growth stages of Oscar fish begin with fry, which are the young Oscar fish that are very small and fragile.
How Oscar Fish Grow and What Tank They Need
At this stage, Oscar fry live off the yolk sacs that develops from the eggs in which the fry were contained. After one month, Oscar fish have doubled or tripled in length and begin to show color pattern. At three to six month of age, Oscar fish reach the juvenile stage and grow to three to four inches in length.
At the sub-adult stage (between six and nine inches in length), Oscar fish require much larger tanks. Should tanks be too small for sub-adult Oscar fish, those Oscar fish may experience stunted growth, or they may become aggressive toward other fish in the tank with which they are sharing there habitat. Oscar fish come in many different color varieties.
Some of the most common include red Oscar fish, albino Oscar fish, lemon Oscar fish, black Oscar fish, and veil tail Oscar fish. Regardless of the color of Oscar fish that you select, all varieties will have the same growth stages. Furthermore, regardless of the color of Oscar fish you select, all varieties will have the same requirements for there tanks.
The only factor that will influence your selection of Oscar fish is the color you prefer. Regardless of the color that you select, Oscar fish will grow to a large size. The tank that you provide for your Oscar fish will have to be upgraded as the Oscar fish reaches different growth stages.
Oscar fry can begin in a 20-gallon tank. However, as Oscar fish reach three inches in length, you should move to a 30-gallon or 55-gallon tank. When Oscar fish reach five to nine inches in length, you will need to provide at least a 75-gallon tank for just one Oscar fish to reduce the stress that the Oscar fish may experience in their habitat.
Oscar fish that reach 12 to 16 inches in length will require a 125-gallon tank. In the case that you would like to keep a pair of Oscar fish, the tank should be twice as large than a 125-gallon tank. Ensure that the tank has sufficient swimming room for the Oscar fish to exhibit their natural behaviors.
In the tank, include rocks, driftwood, and fine gravel for the Oscar fish to sift through the substrate. In order to ensure that Oscar fish remain healthy, it is essential to maintain high level of water quality in the tank. The temperature of the water should be maintained between 74°F and 81°F. The pH level of the tank should be maintained between 6.0 and 8.0.
There should be zero levels of ammonia and zero levels of nitrite in the water, and the levels of nitrate should be kept at 40 ppm or less. Use a canister filter in the tank because these can circulate the tank’s water four to eight times every hour. Due to the high bioload that Oscar fish will place into the tank, it is necessary to provide strong filtration in the aquarium to ensure that the Oscar fish do not develop disease.
Change 25% of the water in the tank each week to maintain high levels of cleanliness. Should you not change the tank water regularly, Oscar fish may develop diseases such as hole-in-the-head, ich, fin rot, or bloat. Feeding the Oscar fish is necessary to fuel the growth of the Oscar fish.
Feed Oscar fry three to four meals of tiny fish food each day. Provide meals of medium sinking pellets to juvenile Oscar fish between the ages of three and six months. Offer adult Oscar fish food once or twice each day in the form of jumbo fish food pellets and supplement their diet with earthworm, krill, or crickets to provide them with the proteins that they require in their diets.
Do not provide too much food to the Oscar fish because too much food can lead to bloat. Do not underfeed the Oscar fish as this can also lead to stunted growth. Ensure that you provide the Oscar fish with a varied diet because a varied diet will keep their colors vibrantly and their bodies robust.
Due to the eating habits of Oscar fish, they should not be kept in community tanks with small fish species. Oscar fish are predators and will eat their smaller tank companions. Oscar fish can be kept with other robust cichlid fish species such as Jack Dempseys or Green Terrors.
Oscar fish can also be kept with fast schooler fish species such as silver dollars. Oscar fish can also be kept with bottom dwelling fish species such as Plecos or bichirs. Ensure that the tank is large enough to include hiding spots for all of the fish species in the tank.
With proper care, Oscar fish can live between 10 and 15 year.
