Agree they just look hungry.
If its in living soil you still need to make sure the water you give it is in the correct pH range. 6.5 to 6.8.
If its distilled or RO water you dont need to check it or adjust it.
If your water is in range tho and this is the result in living soil I would water till you get run off and check the ppm to see where you are. Plants will consume old lower fan leaves and drop them as a matter of routine, but we cant tell how big or how old your plant is. A pic of the whole plant and the age will help.