Oh my, this is what is so great about this forum - you learn all sorts even if it's just about watering conditions for phals.
I have been finding that watering my phals once a week has been too much, so have gone down to more like once every 2 weeks. They are in plastic pots, some in a plain bark mix and the others in mix with peat in it. I think the bark ones definintely need watering more frequently than the others. At the moment I am really just feeling my way round which plants need water when.