I have had trouble producing ground cover in my 125 for over a year now. Everythign else grows very well. I have CO2 cannisters and 3 metal halide bulbs. What am I doing wrong? I've tried saggitarius, but no luck, so I'm trying the glossostigma. Anybody have any helpful hints with glossostigma? I know it's probably easy but so far, I've been a failure with this.