Look at the leafs. The plant will tell you when it needs food or if it's getting to much.
Light green leaves turning yellow usually starting at the bottom of the plant, she needs some food.
Dark Jungle Green Leaves - Your plant is getting to much Nitrogen. possible over fertilization.
IMO- I would get a bottle of Cal/Mag 5ml. gallon every month as a preventative measure.
Alot of the plant problems I see here on RUI are Calcium or Magnesium deficiencies.
Better to avoid those problems with Cal/Mag supplement.