I have found that whenever I buy an orchid from anywhere except a dedicated orchid nursery or grower, (and sometimes, even then) it is always wrapped way too tightly in way too much moss that stays wet way too long. I remove at least half of the moss, and place the plants in more open pots or even wood slat baskets so that the roots can be more epiphytic, which is what these plants are, epiphytes. Sometimes I remove all the moss and place the plants in orchid bark. It depends on the plant.
The advice you have been given by BigBill to frequent the NGA Orchid forum is spot on. There are extremely experienced orchidists there who can answer almost any question about almost any species or hybrid you have if there is not already a thread dedicated to your very topic.
