Marsilea crenata

This small fern comes from Asia, where it often grows in rice fields. The leaves are tiny and rarely wider than 0.5cm. 
It is a hardy plant that tolerates poor light conditions and high temperatures. However, improved conditions are beneficial to the plant. Planted in small bundles that spread with offshoots. Creates a 1-3cm high and close carpet, well-anchored in the bottom layer.

Tissue culture plants are grown in-vitro (literally: in the glass) in a nutrient-rich synthetic growing medium, either liquid or gel, without the presence of any other lifeforms. This guarantees a pest and disease-free specimen, while also providing accuracy throughout the trade.

Tissue culture plants should be removed from the cup as soon as possible. All plants grow on some sort of synthetic growing medium, ranging anywhere from liquid to jelly to firm gel. This should be removed and rinsed off. Gently massage the roots between your fingers until the gel dissolves away. Most plants can be broken up into smaller pieces and spread out in your aquarium. Smaller pieces are easier to plant.