They look great! It's always fun to watch rays, they seem to have so much personality. One of mine likes to go up the side of the tank and snag floating pellets.
I feed my rays twice a day, morning and evening, with market shrimp. Once every second day seems a little light to me for rays but if it works for you, great! At least you can cut down on the food bill (which must be large with all those beautiful rays). I like to keep mine full, with a large hump on their back near the base of their tail.
And nice aro and tig, too!