I've been trying for a few months to root some dwarf hair grass in my 60 gallon tank. I have approximately only 15 fish in the tank all 2" or smaller in size class (mostly tetras of various genus) and a few corey cats. I know it takes a long time and a lot of patience to get a carpet established but my fish seem to be ripping it out of the substrate faster than I can replant it. Any advice on how to curb this habit? I assume it's mostly the corey's doing the damage.