When I look at the aquascapes of others, I notice that they are able to grow small foreground plants in high up areas. There clearly isn't any substrate that high up. How do they do it? I'm not referring to plants like java moss and java fern which can be tied down to driftwood and rocks. I'm talking about plants like hair grass and dwarf sag.
Look at this pic for your reference:http://cdn.onelargeprawn.co.za/wp-co...scapes_002.jpg
How can I plant my foreground plants in high areas with no substrate?