I wanna do grass in my 5 gallon sooo baad. Wanna do it for me gouramis when I get them. Maybe a bit early. This saturday i may add some potting soil with large bits removed ofc as my crypt neeed pretty stuff as well as my amazon sword 2.Tempted to do co2 on my 14g betta tank, but so far the plants are going crazy. co2 will help with your grass, it'll melt at first but should grow back.