Answer: If you suspect your water is adversely affecting your palm, try watering it with distilled water. There's not much else you can do for your palm. Repotting in fresh potting soil (rather than trying to leach out the salts which have accumulated in the present potting soil) might help, as well. Prune off the dead fronds, repot, use distilled water only and your palm should recover. Hope so!
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