I have a 75 gallon tank with a 1 1/2inch Green terror, a 4 1/2inch Jack Dempsey, a 3inch Jack Dempsy, a 2inch Jewel, and a 8inch pleco not sure what kind. My pleco has gotten lazy and algae now grows on my gravel. I was wanting to know if I had room for 3 corys. I read that they get along with SA cichlids if you get the right kind. I also know there will be more waste in my tank but I do weekly water changes to take care of that. So to Cory or not to Cory? That is my question.