hehehe You're both right! I was too casual in reply. My bad. Was thinking of the OP, and his Discus tank. I only replied in context of undemanding plants , suitable for hardscape attachment In that way I was wrong. Of course, with some ingenuity , CO2, good Light, fertz you could do Echinodorus and others on rock, wood and other hardscape elements HM -sometimes that stuff can be stubborn to grow ...or EXPLOSIVE, and I can't STOP it. Pushing the idea of simplicity, very little substrate planted specimens, for ease of clean-ups for FUSSY FISH I'm currently starting a simple-ish 850L sytem (2m IN-WALL tank and sump) for a client: LED lighting, Seachem Flourish Excell, Tropica Plant Growth Specialised Fertiliser It has 4-5 Anubias spp, 2 Bolbitis spp., some moss( Singapore, Java, Weeping), and ug on some pieces of Mopani wood . I also have some crypts for 2-3 patches. If only I can get some local grown Java fern of a few kinds ... Anyone have some leads I can follow? Going to allow tank some time for plants , and schools of smaller tetras and the like, to establish After that period of ~4months It will be home to about a dozen MEDIUM-LARGE Discus The Discus are being grown out separately, yet alongside their eventual home. To get back on topic I may grow Mosses in the sump, as a refugium of sorts.