There are several types of orchid mixes. If the orchid mix that your supplier has, is mostly coarse chips it should be OK. SIDE NOTE: The town of Breckinridge, Colorado each year sponsors the Budweiser International Snow Sculpture Championships. this year's 2010 snow sculpture contest had 12 entries from 6 countries of the world. The first place winner was from Lithuania. The judging and awards were awarded two days ago. http://www.townofbreckenridge.com/index.aspx?page=532 - Millet (1,083-)
I repotted the Calamondin... Let's see how it goes... If it starts to die I'll just buy that "lemon tree" substrate and repot the tree into it. Here are some pictures: Before: Here's how the mix looks like: The roots: And after: