Lets ask where does info regarding whats best for Oscars come from? I suggest it comes from those fishkeepers who have raised and grown Oscars to their maximum potential of size, color and longevity. Of the 6 figure member base of this forum, I wonder how many have been keeping Oscars well over 40 years? I have. Got my first Oscar in 1970. It lived 14yrs and was 14ins when it passed. In these many decades I have probably had 20 or more Oscars. I've grown them to 16ins and had some live 15yrs. I currently have 5, 4 well over a foot long, none over 3yrs old. The 3 keys to successful Oscar keeping are tankspace, pristine water and a varied quality diet, that does include a pellet staple, but also very important is veg matter and significant vitamin supplement. This thread was opened as a Massivore query. I buy Massivore in bulk, my Dovii, Jag, Tex, Midevil, JD's get a good amount of it. Oscars may get a few pellets per month. It is not a food designed for Oscars, and if offered to them on a regular basis will cause intestinal problems somewhere down the line.