Spike damage, sphag moss, two plants in one pot!

[King_of_orchid_growing:)]

First of all, despite what most people would advise about the possibility of using full on moss as a potting medium, I highly advise against it.

This is a highly unnatural way of growing a Phalaenopsis. Naturally speaking, there is usually no moss to very little moss growing on or around the roots of many species of Phalaenopsis.

There are very few pictures of Phalaenopsis growing in the wild. You can pull some up using google images.

The moss retains too much water for way too long and can compact; reducing the amount of oxygen getting to their roots.

Secondly, most of the roots on your plant(s) are badly (as in severely near death) damaged. Healthy roots are white with green tips.

Third, I recommend mounting them onto a piece of wood with a thin layer of moss lightly covering the mount. You can choose to work a few of the moss strands over certain parts of the roots to keep them from dehydrating too much. When mounting they grow horizontally with the leaf tips pointing towards the ground. If you mount them the right way, you'll also notice how they would resemble the leaves of a tropical tree (like how they're originally intended to look like; you know, camouflage to prevent predation).

A little bit more about the general biology of Phalaenopsis. The roots are able to photosynthesize. Hence, there is an advantage to mounting them onto a piece of wood. Doing so would allow for photosynthesis in the roots to occur.

However, if you must pot them, you can use a clear plastic pot with large grade wood chips. If later down the line, it's not enough moisture (most of the time it is), you can put a thin layer of moss on top of the wood.

The pot should be close to the size of the living root mass.

Since, like I mentioned before, Phalaenopsis don't naturally grow upwards like how they're presented to look in stores, they will over time tip over on it's side over the edge of the pot anyways. So if you're potting them, you might as well leave them alone and let them do their thing when they lean over the edge of the pot. It's just inevitable, don't even bother trying to stake it, it'll eventually lean anyways when it starts getting larger and outgrowing your stake.