My nanovivarium today after being in use for approx. 2 years. Some plants were added a year ago (Platystele umbellata, Pleurothallis grobyi, P. sonderana, Cyrtorchis crassifolia, Dendrobium cyanocentrum), and some this spring (Ceratochilus biglandulosus, Lepanthes calodictyon, Trisetella hoeijeri, Masdevallia wendlandiana and Diodonopsis erinacea). The pipe is sealed at the bottom with a glass lid using aquarium silicone. I fill the pipe with pure water (rain, RO) and no fertilizer is given…