think my ray is super stressed for some reason... and the back of his disc is curling but then i make him move to switch a spot in the tank and when he lands his disc is down ,,,,, but will slightly curll urrrgh i dont know what to do because that means death is coming .... also noticed alot of sand build up by his stinger ... and on the 2 back tips of his disc i just dunno what to do ......need imput

