An @Amiga 's advice I got the velco straps. They have been on over six moths and have been working great! One thing I noticed was that pink and red faded so you cannot tell which was which. I am going to place one on a right leg and the other color on the left leg this weekend, that will solve that issue.
Nice to know it's working. Six years in, and a few of the ducks still wear their leg bands, though I don't need them. I have been slowly removing them - one or two started to unravel after four or five years.