Does it have enough, light, food (vitaims, calcium) so that it can be strong enough to support itself? How long have you had it and what are you water quality levels?
Check your alklininty also how new is it and
if you have good lighting maybe it's getting to much most leathers like lower level's then say your acro's need and one more thing have you changed your light's recently .
How long have you had the finger coral. Many corals can take up to two weeks to adjust to a new tank.
How old is the tank and what is the wattage of your lighting?
The pH is a bit low, try and bring it up to 8.2-8.4.
If the coral has been in your tank for less than a month then I doubt if it is due to nutrients.