my experience is this......once you have rays you become willing to get rid of EVERYTHING else!!! I used to have a full tank of gorgeous fish now I have a 500 gallon tank with 5 rays in it......why cause I couldn't imagine parting from the rays! Every other fish went if it even acted like it might pick on one of my rays and one by one they were all gone. Should I have kept the fish and gotten rid of the rays.....not a chance in Hell!!!!