Tiny Dendrobium keiki-Help with a root mystery

[Sharon's Sheepdogs]

My experience with keikis involves phals so if bil finds it more successful to leave the den keikis on the cane, then leave it. My only concern is that the cane may rot which could lead to the death of the keiki. I have successfully grown orchids with New Zealand Sphag but some members find sphag difficult to grow in. I provide a lot of air movement around my orchids which causes the sphagnum to dry quickly. The sphagnum in the photos of Goldstar's most recent post concerns me because it is very dark & extremely wet looking. I believe there is fine bark mixed in with the sphag. Concerned the type of sphagnum being used or lack of air movement might be causing the keiki roots to yellow which could eventually lead to their death. Perhaps Goldstar should remove the sphagnum as his growing conditions might not be conducive to orchid growing using this type of media.