Plants are (from left to right): Dwarf twisted Vallisneria tortifolia (left background) Eusteralis stellata, Anubias barteri nana (on driftwood), Christmas moss (on driftwood), Utricularia graminifolia (left foreground, more info), Hemiantus callitrichoides ‘Cuba’ (right foreground, more photos here), Echinodorus tennellus (right foregrond behind HC), Cryptocoryne x willisii (midground), Substrate: fine black sand (~0.1-1mm grain size). (photo taken with Canon 350D+EFS 60mm)