There is some evidence that higher nitrates can cause fish to grow slowly and or have a limiting effect on fish growth. This means a greater chance for growth as you are removing both nitrates and hormones from the water during a water change. You will have to move them again as they get bigger or the tank will get too small and their growth will be stunted.

5 typically more water changes leads to lower nitrates.

Oscar fish Feed them around 2-4 times a day to help them grow quickly. Faqs about oscars how big do oscar fish get They grow very quickly up to one inch per month until they reach around 12 inches in length. In the wild they usually grow Tiger oscar fish with possible stunted growth okay so i just wanted to clarify i didn t mean to be cruel or anything by doing any of thisbut as a valentine s day present i bought my wife a 5 gallon tank and put a few tertras in there and a tiger oscar. I have an oscar which i rescued from a guy off craigslist who had him in a 50 gallon tank with a bunch of other fish.. He was sick near death when i took him. I brought him home and put him in my 100 gal and nursed him back to health. Honestly didn t think he was going to make it They don t appear stunted and eye size is in proportion to body for this species. As to if they will grow bigger it s really impossible to say.

A lot will depend on the genetics of the fish. Some oscars seem to max out around 14 inches while others can hit 17 inches. The bottom picture looks like the oscar has a touch of hith. Biggest oscar fish approximately 18 inches in size oscar is the world s biggest fish ever recorded. Oscar growth rate an oscar grows between 8 to 10 inches in a year growing pretty fast if you get them a large tank to provide enough space. Giant huge oscar fish a giant oscar fish is generally between 17 to 18 inches in size. Recommend tank size is 100 gallons or more the 75 gallon could technically stunt the growth rate. In the wild can get up to 18 inches max size and in a 100 gallon aquarium your looking at 10-12 . stunted fish is a condition whereby it is used to describe a fish which has stopped growing and the size it achieves is actually below the normal average They will also ended up becoming stunted. Stunted growth also has negative implications towards the health

paracheirodon innesi oscar astronotus ocellatus platy genus A smaller tank can stunt their growth and eventually harm their internal organs and reduce the fish s life span. So it is advisable to go through the oscar fish care sheet which gives a detailed information of their diet breeding and care before getting an oscar home. So this was all about oscar fish life span and care. That was 5 months ago. My fish were out of their big tank for 1 month. And are now 4 months back into their big one. I haven t seen any growth in that time. Did i stunt their growth by placing them in a smaller tank. Should i have found them a better home while the changes were being made or will they start growing again.

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