Oscars and what can i keep with them

Biorb (45 litre): 1 Comet, 1 Fantail, 1 Chinese algae eater


hhmmmm.........
 
I have 5 goldfish in a 75 gallon tank. I wont be adding anything else to the tank.. I dont have room.

however the only other thing i would put in a goldfish tank is a weather loach (aka Dojo Loach) nothing else can handle the cold water that goldfish need.
 
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