My fish eat Nori from my hands too but that method is not convenient for my schedule. My fish get fed 3 times a day. Nori for breakfast, staple foods for mid day and frozen befor dinner. For me the mornings are hectic so I strap some nori to a stick of PVC and just insert that into the tank and let them have at it. It takes them a little while to rip off bits to eat plus they all have to take their turn. I like the stick because then I don't get my hands wet
