This very decorative variant of Ceratopteris thalictroides was found in flowing waters of northern Vietnam. The Vietnamese water sprite differs from standard C. thalictroides by ligther, yellow-green coloration, and the pinnae of its filigree fronds are arranged in a sharper angle so that the fronds have a more "streamlined" structure. Alse Ceratopteris thalictroides "Vietnam" develops into a large plant with about 50 cm long, 20 cm wide leaves.

To Ceratopteris thalictroides "Vietnam", the same applies as for standard C. thalictroides: it is quite undemanding but grows best with at least medium lighting and good nutrient supply. On old, especially detached leaves adventitious plantlets appear, making the propagation easy.
It is recommended to put the leaf rosette of Ceratopteris species not too deeply into the substrate. The "heart" of the plant where new fronds develop should remain above the bottom surface.
However, when water sprite is delivered as potted plant, it often has hardly roots and detaches easily from the rockwool substrate during transport. But the plants will grow new roots in the aquarium. They can be floated until the roots are long enough for planting, or pinned onto the ground with a plant pin (e.g. JBL - ProScape - Plantis) right away. New plantlets may sprout on broken leaves.
Also the planting of young Ceratopteris plants from tissue culture may be somewhat difficult. The plantlets are often entangled and not easy to separate from each other. Also in this case they can be floated until their roots are grown longer. It is also possible to plant or attach clumps of several plants.

With its filigree, light green fronds, Ceratopteris thalictroides "Vietnam" is an eyecatcher in the midground to background of not too small tanks, as solitary plant or small, loose group. It should also fit well into stream biotope tanks.