Alright... here is what I managed to set up.
The gravel is fluorite. It has root tabs under and a fine layer of ferrous sulfate heptahydrate, and potassium nitrate beneath the fluorite (hmm... I might regret having done this later on).
I bought a glosso mat because at the time I thought glosso was the same as HC. BUT when I look at the plant, it doesn't look like glosso... the leaves arrangements look more like HC. I will post a close up pic tomorrow and maybe the experts here will be able to tell
I think I may have "thinned" out the dwarf hairgrass too much. I hope it will grow anyways....