After the cracked glass incident, I bought tempered glass at a cost of $60 to take the heat.  It was all for naught as my Hoya imbricata languished in the aquarium and did not do well at all.  I removed it and made a larger mount out of U-shaped bamboo, covered in plastic tubing, covered in sphagnum. This whole contraption sat in a weighted terracotta pot.  There the plant lived for two years, and that is all it did was live, if it put on a new leaf it would lose a leaf.  It did very poorly.

Below a close-up of the flowers on my Hoya maxima Red Corona: