I put one around a green star polyp to hold it to the rock about 3 months ago. Well, i completely forgot to remove the band after the gsp had attached to the rock, but i guess it doesnt matter now...the gsp has completely overgrown the band and i cant even see it now lol. I'd have to take off the gsp just to get at it, which i dont think i really wanna do.
but no problems for me