Planted Tank Guru
Join Date: Dec 2002
Location: Portland Orygun
Well to start with how much light do you have on this tank? That makes a huge difference in ground cover choices. Also you should read my FAQ about cycling a planted tank. I think it would help you out a lot.
Now on to your question. I have not found a lot of "low maintenance" ground covers. Either you have ground covers that grow fast, Glosso, and require work or you have ground covers that grow slowly, C. parva and take a long time to fill in. You could go with dwarf Sag but I really don't consider that "low maintenance", at least it's not in my tank.