Dend. Oriental Smile 'Fantasy' yellowed

[KHissam]

No black roots, just white squishy ones. I do have a couple of lovely firm greenish roots. Are these amenable to semi-hydroponics (I didn't see them on the sticky list in the SH thread)? Now I have to learn all about this type. I've only had the den-phal sort! I've heard of using a 50/50 spray solution of 70% isopropyl alcohol and water with a small amount of dish soap to treat the leaves for mealy bugs - is that safe for dens? Unfortunately I think I may have gotten them from the supplier :-/