Despite their distinctive appearance, the salvinias are floating aquatic ferns.
The leaves are usually rough and arranged on either side of a floating horizontal
axis. They reproduce by means of runners, and can rapidly invade a tank, although
they are sensitive to drops of condensation falling from the lid.
The floating leaves of the salvinia are more than 1 cm long, which distinguishes
it from the closely related, and otherwise biologically identical, S. minima. If
the lighting is good, it grows quickly in neutral, soft water. It is recommended
as a haven for fry in rearing tanks. Size of a floating leaf: 2 cm.