Woah. nice. Congrats dude. I would love to breed rays. Now you gave me inspiration. Tell us more on the water param too. Temp in the tank and stuff. 11 pups wow
Also, water change three times a week about 40 percent each time. Try to obtain a female as large as possible and feed the hell out of her so as to gain a large litter. That's all the tips I have to offer.