Good co2, medium-high light seems like you got the rest covered. Especially when you split them in half with a razor co2 becomes really vital in growing them. I haven't a clue that this was endangered, luckily we've got growers in the hobby. Roots are really thick. Once they deteriorate its harder to grow em back, so best keep husbandry up to the optimal from the start.
you can see a root popping out on mine
you can see a root popping out on mine
