I used the same coco husk substrate with all of my plants and nothing has ever looked as bad as the leaves on Hoya Species Unknown aff. solaniflora. By the way, this plant used to be called Hoya sp. aff. solaniflora, but apparently it was decided that it was not really close enough to the real H. solaniflora to deserve the Aff. designation so now the poor thing is Hoya species unknown.

The roots on the plant look healthy, and it puts out new growth that occasionally looks pretty good so I have hopes that it turns around and becomes healthier looking with age. The plant was at least able to put out a peduncle and buds in its less than stellar condition.