I'm assuming the rhizome is the black roots. Its not covered at all. It was tied bare to the decor with a cotton string, but my shrimp ate and cut through it, so now the fern is somewhat floating/resting on the rock.
I'm planning a trip to the "not-so-local" fish store this weekend since all I have near me is Petco/Petsmart, and they don't carry many plants (their plant substrate they're selling is nothing I've ever heard anyone here use). Planning on getting a plant substrate (debating between Eco-complete and Aqua Soil, but I've never used planting substrate so I have no idea what to use... those two are the only ones I've heard recommended... so if there are any other really good ones let me know), as well as some more plants and hopefully some better lighting. Will check out some liquid CO2 options as well, maybe with a couple dosings a week I'll get that DHG to grow.
Any advice on substrate and what type of lighting? My hood only has 2 LEDS in it (which I'm assuming is bad) so I dont know if I need a new hood, or if there's some way to but a light in under the hood. Also, what type of bulbs would I need? Theres a bunch of conflicting information about how much light is emitted and such, but if I'm looking at the box of bulbs how do I tell (how to use info on box to tell they're the right bulb... I dont have any way to measure light output thats why I'm asking).