My dad has this starfish in his tank for about 4 months now, but lately when I’ve visited one of the legs of the starfish seems to be deteriorating. On my most recent visit, the leg that was originally effected looks much shorter and now the same thing is happening to another leg. My dad had gone to a LFS but they said it has a bacterial infection that has no treatment. Is this truly the case or is there truly no hope for survival?