Add water to cover just the pumice stones in the bottom of the vessel below the roots. The pumice stones will gradually move the moisture all the way up to the surface stones or into the moss via capillary action. Add a water-soluble orchid fertilizer in very mild dilution. Remember, none of the fertilizer will run off as waste so you need a small amount only. Recommended dosage is 10% of normal strength. Add more water when stones and/or moss is dry.