Question
I just bought two potted phal (can't remember how to spell the rest of it) orchids that are beautiful, tall and have many large healthy looking flowers. They're in a glass pot with bark on top and some jelly looking substance on the bottom. I literally just bought them three days ago, and they looked great, but yesterday the lowest bloom on one of the stems started to wilt. Then today, the next bloom up started to wilt and the lowest bloom was fully wilted. The rest of the blooms like fine. But I'm worried that the next flower up is starting to look like it's beginning to wilt. Am I killing this orchid?

Answer
If those flowers that have wilted had been open for some time, it is likely that this is just part of the normal flower aging process.  The flowers that open first, and are lowest on the flower spike, will be the first also to wilt.  You are not killing the orchid.

I am concerned about growing the  orchid after blooming in the mix and pot that you have.  The gel is meant to hold water.  That is fine for the short run, but it will eventually lead to root rot.  Hopefully, the glass pot has drain holes in the bottom.  When the plant has finished blooming, you will need to buy a bag of orchid pottting mix and repot you plant.  When you remove the plant from its pot, carefully remove all old potting mix and any roots that are "mushy".  Healthy roots are firm.  Also, if your glass pot has few or no holes in the bottom, when you repot, use a plastic pot with as many drain holes as possible.  Healthy orchids require a lot of air movement through the potting mix.