Catts like to dry out quickly and I have some in Hydroton in slat baskets and clay pots with extra drainage wholes. They do fine like that. I also have some in plastic tubs with a water reservoir and they do fine that way as well. . I water 2X per week in winter and 3X in summer. I have not tried Cyms but Phals you will want a water reservoir for. It is best to make this change over at time of new root growth