Dendrobium Aggregatum to Pot or Mount ?

[NYed]

A month ago I purchased a Den. Aggregatum and would like some advice from other growers on how they grow it. It looks like it was just out of a plug tray growing in rock wool. It has 7 growths the largest being 3 inches. I potted it in a 3 inch net pot with loosely packed sphagnum moss for now.I water when moss is almost completely dry. It seems to be doing well and now has a new growth starting. Now would be the time to make any changes so any advice on what other growers use as a medium would be appreciated. I am a window grower in winter so I don't know if mounting would be a option.