(only kidding before i get kicked off lol) I aquired the rays when i bought the tank as they came as a complete package and although i have learnt alot about rays i dont realy know enough to keep them without worrying constantly. Dont get me wrong they are happy and well looked after and i am in no hurry to get rid of them but if someone comes along and would realy like them then i am happy to sell them to them. I have decided to have a complete change in the tank and just have cichlids in there either that or get rid of the dog!!!! lol To tell you the truth the rays are great fun and always darting around the tank up and down but we realy have fallen in love with having a cichlid tank and will do that when all the rays have gone. Hope that answers your quiestions. 
