Nature's solution for Aiptasia control. We get our Berghia from Reef Pest Solutions. RPS is local to us and they are hand delivered. We have found their Berghia to be very hardy and they ship very well. Quantity discounts available through our site. They can be found here- http://www.barrierreefaquariums.com/productcart/pc/Berghia-Nudibranch-55p11560.htm