not sure on the lighting you are going to have, this could effect plant selection alot. But a few safe low light plants to put in between rocks and stay 4-8" would be Anubias species, some cryptocorynes, and maybe some needle leaf java ferns. Depending on if your looking for broad fat leafs or skinny ones.
I would tend to agree on a tank that large HC doesnt work that well. Try some dwarf hair grass or some E. Tenellus for a grassy lawn look. Or some Marsilea Minuta or Glosso for a fatter leaf carpet. Also in a tank that large a carpet of larger plants like Bylxa or even smaller crypts might work.
I would tend to agree on a tank that large HC doesnt work that well. Try some dwarf hair grass or some E. Tenellus for a grassy lawn look. Or some Marsilea Minuta or Glosso for a fatter leaf carpet. Also in a tank that large a carpet of larger plants like Bylxa or even smaller crypts might work.