Hi, I need some advice on which orchid media would satisfy oncidium/ miltassia needs. I'm guilty of multiple counts of overwatering , and I'm hesitant to use sphagnum moss ( which takes a long time to dry.) I live in nyc; my orchids are in a small 5 foot portable greenhouse, with a small fan and a humidifier.Help please! I just can't crack the orchid watering code thanks