Cladophora aegagropila is not really a plant, but a ball of algae from 3-10 cm wide. It is a decorative exception from the rule about avoiding algae at all costs.
It is normally found in shallow lakes, where the movement of the waves forms it into a sphere. In an aquarium it must be turned regularly to keep it in shape. Cladophora aegagrophila can be divided into smaller pieces, which become spherical with time, or which form a carpet, if attached to roots and stones. Protected in parts of Japan.
Considered easy to grow
Can be attached to wood or stone
Bred in cultivation
Slow growth rate for easy maintenance
Reaches average heights of 3 - 10cm after two months in the tank.