Oscar s naturally live in shallow flood lakes and slow moving tributaries not a fish that needs current. I feed them both hikari gold. Two Oscars in a 125 gallon tank will require one moderate water change per week or possibly one large water change every two weeks.

Have got one 6 inch oscar and one barramundi.

Oscar fish Two oscars in a 75 gallon tank will require at least two large water changes per week. If you plan to have other fish in your tank besides oscars. Oscar fish have a special appeal to them. They might not be the friendliest species in the world or the easiest to care for by any means but they are certainly one of the most attractive and beautiful fish species out there. Then a 75-gallon tank would be better. Female fish are often more aggressive than males. But they only turn I have a huge 10 inch oscar panda s his name in a beautiful 75 gallon with a 5 inch rainbow shark bullet and 2 chunky raphael cat fish rubble and double they are all super happy and thriving They have all lived together in my dinning room since the beginning going on 4 years.

The next step is to get them in a 120 gallon Is a 75 gallon tank big enough for one oscar fish and one plecostomous I have a 75 gallon aquarium and was wondering if it was suitable for one oscar fish and one plecostomous to grow up in I wouldn t put 1 in a 75 gallon. I wouldn t put 1 in any less than a 90 gallon. They need a lot of swimming room. They are also very messy and a 75 gallon just can t handle that in my opinion. I have 4 12 inchers currently in a 150 gallon and i am needing to upgrade that monster after only half a year. I m going to be getting a 250 gallon-300

The minimum would be a 55 gallon for a single adult oscar but even that is pushing it. You would have to be meticulous in doing large weekly water changes and have no other fish in the aquarium. Because of it s size and messiness the oscar really should be kept in 75 gallon tanks or higher. Oscar fish tank size in gallons varies as per their size but in the general case it is minimum 55 gallons for a single fish which is typically about 10 inches in length in captivity. In perfect cases best size should be 75-gallon for one adult oscar fish. Capacity increases with increase in number of oscar fish to be kept. Chocolate cichlid would be a good tankmate choice but they get pretty big 11-12 and i would not keep one with an oscar in less than 120g. I see a lot of things on youtube too with all kinds of large fish in a 55 or even smaller sometimes but these tanks are overstocked and at some point these people will most likely experience a fish getting killed or serious health problems from high

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