Meiracyllium trinasutum--pot or mount?

[JImG]

I would truly not worry about it. Pot or not. I have had one mounted on a tree fern mount for countless years in a greenhouse in CT. It has wrapped itself completely around the mount and is growing upon itself. In the winter I can only get there once a week to water. Normally the same during the summer although I do try to get there midweek on hot summer days to water. This all to mean that my meiracyllium dries out completely and remains that way all week until the next watering and it still grows vigorously. The residual humidity in your tank will be more than sufficient. But, to your point, if it will grow in a pot, it certainly will although I does need a substrate to grow upon. And moisture will help that out a lot. I have taken piece of the main plant off and given them away and plopped them onto the pots of other orchids and they grew, eventually crawling off the sides of the pot and clinging to them. Growing on a terracotta pot is even better than growing on bark mulch. Mine blooms religiously every year with very little care. With yours in an accessible tank, you can baby it and it will flourish. Hand misiting once in the morning and again in the evening will be fine. Hope this helps.