I am a beginner Paphiopedilum grower. Currently, I have:
Paphiopedilum Malipoensa "Josh" x delenatii "Destiny"
Paphiopedilum Delenatii var. Dunkel
Paphiopedilum barbatum var nigritum
I am currently using FirstRays K-Lite, and from what I've read here, I may not need an additional Calcium...