Oscars

Yes i do filter the tank like plenty. I have three powerful filters and two sponge filters working round the clock. My oscars sure are gluttons for food, they seem to be hungry every two hours. Is it ok to put two 2" Red Lobsters in the tank with them. I was just wondering "Do the Oscars yawn ?" as mine seem to.
 
When the oscars get bigger, they will probably tear the lobster/crayfish apart. Mine would try to eat any plants I put in the tank, and usually end up tearing it apart and pulling it out of the gravel. I don't put plants in there any more.
 
AquariaCentral.com