• Providing good light

    In addition to healthy water, correct lighting is the most important thing for your marine water aquarium, as life can only thrive when it is present. At the same time, fish need less light than corals and plankton.

Light intensity

The light must be more intense than in a freshwater aquarium. Only then will it be able to penetrate as far as the symbiotic algae (zooxanthellae), which live in the tissue of, and feed, stony corals, anemones, etc. New T5 fluorescent tubes and LED lamps are, more and more often, replacing the frequently-used HQI lamps.  

Light spectrum
The colour spectrum of the light must be accurately balanced in the marine water aquarium, with the blue element predominating (from 10 000 Kelvin). The ideal solution is a combination of the daylight spectrum (white) and deep blue light. The light colour “red” is not suitable for marine water aquariums.
To reinforce the natural fluorescence of corals you can also make use of an actinic light.

Lighting periods
Basically, full light should be switched on for 8 – 10 hours, plus one hour of dim light in the morning and another in the evening. You can simulate sunrise and sunset by switching light sources on or off, one by one or by means of a dimmer switch (e.g. in the case of LED lamps).
If your aquarium is lit for a longer period in the evening, simply switch the light on later in the morning (timer switch). There should be no breaks during the light phase as is often recommended in the case of freshwater aquariums.

Light zones
As in nature, you should create strong, average and weak lights zones, because different creatures (corals and sponges) need different amounts of light. Gradation will be produced by the depth of the water, with weaker illumination at the edges and shadows under ledges and in bays in the decoration.