I have a Phalaenopsis standing in a pot which is in another pot. The orchid pot sits on a brick to raise it above the water that drains through after being watered. Some of the roots have grown over the side of their pot and extend down to have their tips in water thta is about 1 inch(2.5cms) deep in the outer pot. They are over a foot(30 cms) long. Is this a good thing to allow or should I direct the roots over the edge of the outer pot?