Vanda denisoniana has chalky white tips
 

I purchased this Vanda six weeks ago from a local dealer and placed it in a basket with a small amount of Spanish moss and coconut chunks. It has quickly sprouted a new leaf, a vigorous aerial root, and a few smaller roots visible within the basket.
After sometime at home, I found that the tip of one leaf was developing a chalky white tip. It looks to be dry water, or a salt build up and is only on the top side of the leaves. Seeing that the white has developed on most of the leaves, I thought that it may be my water or the chemicals in my water, or possibly, my fertilizer.
I let it be, and continued my normal regime of watering every morning - twice on a hot/dry day - and routine fertilizing (once weekly weakly).
Today I attempted to gently wipe the substance off with a damp cloth. The white seems to wipe off completely, but a moment later the white appears again.
I have enclosed photos in the attachments.
If anyone shares any ideas, suggestions, or information I can use, it is greatly appreciated. Thank you.

I think its algae or molds....wipe it with cotton balls dipped in brown listerine....Fertilizer salt or water deposits will be spots and blotch....not jus confined to the tip of the leaves

Thanks, Bud. I will try to do that.