will it be good that the chocolate is already large and more mature? will it decrease the likelihood of the oscar taking over? i have never had an oscar so im not sure about their behavior. dont want my guy to geat beat up.
Like Pepo said, iv heard of people having very good experiances with chocolates.
Could could always put in some dithers like giant danios which they then can try and chase, they wont catch them but its funny just watching my oscars try. They also clean up the mess when feeding. If you do make sure they are big enough from the start, they dont grow as quickly as oscars!