Join Date: Sep 2010
Location: West Hollywood, CA
Any variety of moss that you like. Java moss, x-mas moss, weeping moss, fissidens, etc. Marimo moss balls. They can be broken up and laid flat to make a little carpet if you want. Crypt parva because it stays tiny and in my experience grows really well and bushy in low light.
If your substrate is inert and has no nutrients, stick with anubias and moss and maybe baby java ferns, knowing they will eventually outgrow your tank.