There's a very small opportunistic plant growing out of cracks in the lava rock of the Little Malawi tank. Only two instances, but they are remarkable. The leaves in this photo, shot from a distance of about two inches, are less than a millimeter long. Calciferous algae glows on other rocks; I don't know if their brightly-colored stains will remain once the tank is established. And what other vermins lurk in this otherwise barren conserve?