Tolumnia in Net Pots with DRY Leca

[Grawski]

Thanks everybody, for you insightful comments. It appears that my challenge will be providing higher humidity and, all the while, not keeping them wet. Was Leca the wrong choice? I thought it was suitable due to it's fast drying, but it will probably dessicate these delicate plants. I'm not opposed to switching media. Would coarse perlite be a better option than Leca? It may sound like I'm grasping at straws here, but this is the gallery of experienced growers. The internet is a poor theater in which to learn about these issues.