Ive had these rays for over a yearnow . I bought her from a friend of mine in GA. She was already 11-12 inches at the time. I bought the male ray from david webber about the same time. he was about 8-9 inches. I didnt do anything special, just lots of food(mainly nightcrawlers) and lots of water changes (ph 7.0-7.2), temp from 80-86 degrees, all in my 240 gallon tank with two emperor 400 filters and two rena xp3's. Clean and consistant water changes 25-50% every sun and wed with tons of worms fed to her. Apparently it might have work. I know this is nothing technical or something wonderous just consistancy i think is the key.