Late to the party. Just from the pictures, I see no fertilizer issues as Dimples says. From the pictures, the only thing I can see is a little bit of black spot on the phal leaf and a few on the crown. From the picture it appears really light-colored. The Onc looks like maybe a bit of sunburn from water on a leaf that was magnified by sun. The vanda looks like a fungus.
If you've been growing and blooming your phals successfully, the only thing I might suggest is a bit less light. And that's only IF the light grassy green color is reality and not from the picture. I wouldn't put them outside either if you have outside bug issues.
The vanda I'd get outside and hang under a tree or eave. Put some bacterial/fungal treatment on it if you have it, or spray it off with some rubbing alcohol. That gives it time to recoup while you figure out how to keep it warm once temps drop into low 60s, or find it a new home if you don't want to mess with it. It sounds like you're not super fond of it, and it's a baby. How much do you really want to baby it?
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Caveat: Everything suggested is based on my environment and culture. Please adjust accordingly.
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