had one get a hole like that ontheir head the littleguy healed right up I kept it neo up every otherday. after 4 sheds it was completely gone and i can't tell whaich snake it was now. Mine got theirs by pushing against the tub lid .

It possible was near the plant and got scared and jerked head back and caught self on the wire, nocking the glue off and doing the damage. watch it lose the plant and keep it neo and be fine.