I'm not an expert, but it looks ok to me. Hopefully someone else will jump in.

Maybe you could use it on a crabby boo boo if one happens lol.

Once in a while my tortoise will get a boo boo from her cypress mulch poking her. I would flush it with sterile saline and then use Vetericyn spray after for a week. It always works great. Not sure why I'm telling you that, just rambling on I guess haha!
Edit: I just realized the spray isn't for the crabs, it's for the substrate/tank, oops lol!
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