Newbie with S/H questions

[svlair]

Hello! I am new to this board and orchid growing. In only four months I have assembled a collection of eight Phals and all are doing well in traditional culture. Seven of the eight are still in bloom so only one has been repotted. The Phals are in a variety of media and pot sizes so each seems to be on its own watering schedule. I water at least one of them every day. I would like to get them all on a similar schedule. I have a few questions about S/H.

1. With multiple orchids in S/H does each orchid have its own reservoir?

2. Is the reservoir filled with water only or a weak fertilizer solution?

3. If fertilizer solution, how do you compensate for evaporation in the reservoir without concentrating the nutrient solution?

Thanks for the input.