Microalgae or often so called nuisance algae, are microscopic organisms that live in water as single cells or in colonies. Microalgae can grow very fast, and some species can double in size in just 24 hours.

Opposite to macroalgae they are that kind of marine algae you do not want to have growing in the marine aquarium which gives them their name: Nuisance.

The most common microalgae in the marine aquarium and reef tank setups are: DIATOMS, FILM ALGAE, DINOFLAGELLATES, RED OR GREEN SLIME ALGAE, GREEN HAIR ALGAE AND BUBBLE ALGAE.

IDENTIFICATION OF NUISANCE MARINE MICRO ALGAE