tank mates oscar

I have one large Oscar in a 125 gallon, 6ft. long tank. The Oscar is about a foot long. The tank is very open. I don't have substrate, just a couple of medium-sized decorations placed in the center, against the back of the tank. We've considered adding another fish, but I'm hesitant because this...

hi! i have a tiger oscar ( not agresive) in a 300 gallon and want to add some angelfish (around 16 adults ) to the tank, but not sure if that is possible. the 300 gallon tank has a lot of hiding spots and has very good filtration( capable of supporting a 2000 gallon) any thoughts on this