Yes, I buy frozen formula one and cut it into small chunks. I take a wooden 'kabob stick and stab the food and feed each polyp. I give the larger polyps 2 or three pieces and the tiny polps sometimes share a whole piece. I do this 3x a week. It seems to be working, they are spreading or having babies or what ever it is they do. I have more then when I bought them. I LOVE THEM! They are so cool!