welcome to the site.
you can use either but i think that the fine roots might be too small for any type of current or water circulation to hold it down. i dont have any experience with it in sand though so i cant speak from experience. it seems to do pretty good in flourite
you can use either but i think that the fine roots might be too small for any type of current or water circulation to hold it down. i dont have any experience with it in sand though so i cant speak from experience. it seems to do pretty good in flourite