Sleeping aquarium fish

Times of day in the aquarium: light on, light off - take into account the day-night rhythm of the fish

The closer an aquarium landscape comes to its natural model, the more beautiful it is for residents and viewers. Creation poses a particular challenge optimal lighting conditions These not only ensure beautiful visual effects, but are also a prerequisite for healthy fish and controlled, natural plant growth.

"The incidence of light in seas and lakes is of course far more complex than it can be implemented in an aquarium," says Jan Wolter, veterinarian and ornamental fish expert from Berlin. “Nevertheless, there are numerous aids that make it easier for aquarists to imitate nature.” According to the expert, it is particularly important to be on good terms coordinated light and dark phases to pay attention to. Because these are also found in nature day and night. Diurnal fish need the dark time to recover. Post-active species, on the other hand, sleep during the day and only become active when it is dark.

During the day, different lighting conditions can be simulated with different light sources. Regardless of whether it is a South Sea feeling or a tropical brook biotope - the most important thing is that the lighting is optimally tailored to the needs of the respective plants and fish. At night you can switch on a special, gentle moonlight for a short time. This way, aquarists can observe both sleeping and nocturnal fish species without disturbing them. By the way: fish can swim even when they sleep. Their sleep is not as deep as that of humans, so that they are wide awake quickly and can react in the event of danger. Even during sleep, the eyes are open because fish do not have songs. Hence also Avoid bright light during the night, otherwise the sleeping fish will be startled!

Based on an average tropical day, have full lighting for ten to twelve hours proven to be optimal for aquariums. Plants and fish are adequately supplied with light during this period. Lighting times of over twelve hours would encourage increased algae growth and should therefore be avoided. With a Timer aquarists can easily keep a regular day-night rhythm.

“Ideally, you don't switch the light in the aquarium to full power abruptly in the morning. Sudden darkness should also be avoided in the evening, because even in nature it only gradually gets lighter or darker. In aquariums with several fluorescent tubes, these can simply be switched on or off with a time delay. This saves the fish stress. "

Source: IVH

This entry was published in Aquaristics & Terraristics by zooplus. Permalink