Thank you for your kind words.
The small grass on the right and rear-center is blynx japonica. The larger on the left is subulata. The picture is not clear enough for plant identification.
I left the clear sand area in the front for Corys, which I don't have yet.
What do you feed dwarf crayfish? They are not showing any interest in the Hikari algae wafers, or maybe the Ottos are just out-competing them.