Good Foreground Plant

[gatorsean]

i would like to have a carpet in my tank. its low tech, i dose excel and micros, and, i would say medium light: 135 watts of t5 but im using duckweed as light control. i have some dwarf hair grass in there already but it hasnt really taken off yet, only been in there for about 3 weeks and is growing but not spreading.

so my question is what would be a good choice to make a carpet but not take years to accomplish. i was kinda thinking about bacopa australis but im not sure if my lighting is good to make it carpet.

thanks in advance
just looking for suggestions for the best, easiest carpeting plant