When you say don’t fit. What would that mean. I have them with Bichirs and they could fit in their mouths but they don’t eat them. And when I say tankmates. I meant for the upper level of the tank. Thanks
Then you are lucky or do a great job of feeding them because from my experience, Oscars will devour anything that they can get in their mouth. I have had them with Convicts but they were on the larger size.