I currently have a 19 inch tire track eel in my 75 gallon and I'm trying to upgrade to a 300 gallon tank to put my arowana, gar, and eel in. Im wondering if I could put a ray or two with the eel, I know it could be a problem sonce they're both bottom dwellers and I don't want the eel to spook a ray and get stung. I have him in a 3" pvc pipe which he loves but he does like to come out when he's hungry (which is often). What does everyone here think?