well the i have the Mayan already hes about 5" in a 25gallon tote its pretty wide its just a temp home till i can find a something bigger and the oscar is free some woman said she couldnt take care of it anymore but she said its around the same size( about 5") but like i said it would be a very short time before they will be in a 50 or 60 gallon hopefully bigger tank i know they will be needing atleast what like a 120 or 150??