im growin dwarf hair grass with diy co2 and eco complete with root tabs and water ferts and 24watt light in a ten gallon. it is slooooooow groooooowing. ive just started to add flourish excel but waiting to see improvement. I reckon it must be the co2 because thats all i had little of until now.
not only is dwarf grass easier, if you don't trim it, it can overrun the whole tank. I have both dwarf and HC, and I have to cut the dwarf and pull out runners so it does not blanket over the HC, which it can easily do. Definitely HC looks nicer.