a 25 (do they even sell 25's? is this tank custom made? you may have a
29 or 30. what are the dimensions) is way too small for 2 full grown
oscars. be prepared to move them out soon. they grow VERY quickly.

i give this advice as i prepare to move my 2 4"oscars out of my 30
into my 125. One oscar alone needs around 55. you may be okay with
two in a 70.

i believe the temperature needs to be 76, so this may be a factor.

although its fun to watch the oscars hunt and play with their food,
feeder fish are known to carry diseases and cause a disease in oscars
known as "Hole in the head" real descriptive, but thats what it is.
also, ive been told that feeding the o's feeders will promote
aggressiveness.

if you HAVE to feed your oscars feeders, keep the food in a tank of
its own for a week or two, and medicate. just be careful.

hope all this helps!
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