No, it's not really the same type of watering as with phals. Like Philip said, they should get watered when the medium has dried out to be just damp. They like to be damp. With Phals they need to be nearly completely dry. Masdies also tolerant much less fertilizer than Phals. For my masdie I cut the dosage down to half of what the other orchids get.
__________________ Camille
Completely orchid obsessed and loving every minute of it....