just bought new albino oscar, he/she is just sitting on bottom of tank, my other oscar didnt do this

He's sulking. Normal for an oscar to do.

By the way. Please try and find an appropriate forum for your thread in the future.

oscar are known for their sulking abilities. if you just purchased your o give him a couple of days to get accustomed to his new enviroment. also make sure your water is in good condition meaning ammonia 0 nitrite 0 and nitrate below 40 (the lower the better).

good luck with your addition


btw welcome to the site