Palms and Cycads: Concerned about my Phoenix Sylvestris, 3 by HSP1

HSP1 wrote:
I hope that this is easy have a Phoenix Sylvestris that has about 7 feet of wood. I am seeing yellow spots on many of the leaflets. Another thing that I am seeing is the new growth looks to be brown and drooping... a couple have fallen. I hope that it just needs some manganese...or magnesium. I typically just give it fish emulations and it has been doing good up until now. I have though...seen the yellow spots for 6 months + and have not addressed the situation. Any help would be appreciated...would hate to loose this plant.