The cosmopolitain Egeria Densa is a good plant for beginners, and its rapid growth helps create a balance in the aquarium from
the start. Stems grow fast to 40-100cm and become 2-4cm wide. Egeria helps prevent algae because it absorbs a great number
of nutrients from the water. The plant secrets antibiotic substances which can help prevent blue-green algae ( a type of bacteria ).
The growth rate depends largely on the amount of light and nutrition available.