I Think so too. When they are bigger I will put them in the pond at once. My reasoning is that if I have plenty of water plants a few bites won't decimate them. I will try to do as Turtle Mike says. Give them fish often and they will lay off the Lillie's!. I my plan fails, no water Lillie's :'(
Great looking vine too. The Hoya is potted and in the green house.