Hi. I was looking into putting my phals and one paph into S/H. There is one thing that is worrying me though. I have read in a few threads here that phals will get root rot in the winter if they dont have a heat mat under them. I cant buy a heat mat (my mother wouldnt allow it). the temp in my house stays a steady 72 degrees in the winter. Do you think that i can successfully grow with the S/H method without a heat mat?