its a 55g soon to be 75g or 90g. Half the tank is filled with drift wood where 2 x 4in pictus cats, 1x 3in raphael cat and 1x red tail shark like to hide. 1 quarter is divided where a big peice of rock is sheltering the poly.
Should be fine for now. I'm just worried if the oscar outgrows th del and eat it. Hopefully your del grow fast as some grow faster than other and slow down at 10".