why not split up the clumps and make pencil like DHG inserts? this will grow the carpet ALOT quicker how you have it setup now.
Yeah that would be the best way. But it takes for ever to plant the tiny plants. For me I rather wait for it to grow then plant each tiny bit.
I planted some months ago in a low tech tank it took a month to see runners. It's not growing much. But it's green and looks nice still. Nothing died off.
I planted some in a tank with more light and co2. We will see how that goes.