Algae grow in a fish tank because they thrive
on the same things that aid the other living things in the tank: nutrients and
light. Too much light, whether natural light, such as sunlight, or artificial
light can cause algae to grow. The warmer the water -- usually heated by light,
and nitrates, which form from the waste created by the inhabitants of the tank
-- can cause algae to grow quickly. Although algae can be removed from the tank
without removing the marine life and water, they can also be removed safely
while the tank is empty. Algae are simple organisms that contain chlorophyll and normally
grow in aquatic conditions. Algae are found in places like rivers, lakes and
streams, but are also commonly found inside home aquariums. A little algae
growth is normal and can be beneficial to the overall health of a fish tank.
Large amounts of algae can have negative effects on a fish tank. Too much algae
makes for an unsightly appearance and can create stress on fish living in the
aquarium. Aquarium owners generally want to control algae and reduce its
growth in their tanks, but at times, algae is actually a desirable plant. You
may want to use a mat of algae to provide cover and security for baby fish or
shy adult fish living in a community tank with more aggressive species. Getting
algae to grow is not hard once you supply the proper growing conditions and
materials.
