Forgot to update. I traded then up for some Acan's last week. The colony had grown to 8 heads and then for some reason didn't look good any longer. I didn't find any hitchhikers in it when I did a dip, moved it to a different location and 2 heads disappeared. Figured it's better to let it go to a better home and at the same time get new stuff in return.
I may get another frag next week and see how well it does on a frag rack that I now have. Before I had the frags on the sandbed and I don't think that is the best place for them.