Quick fact about light colour for freshwter aquariums. Lighting does not merely serve a clearer view into an aquarium, it is important where water plants are present.
The right kind of light is crucial for photosynthesis in water plants for plant growth. Too much light or the wrong colour of lights used will encourage algae growth in an aquarium.
In order to flourish, water plants need plenty of light from the red colour range of a colour spectrum, with only a minimal blue component and minimal or no UV radiation at all. Whereas algae thrive above all in blue light and a high UV component.
Algae have lived in water throughout their entire evolutionary process, during which they have been exposed for the most part to strong, direct sunlight and ultra-violet light. Most aquarium plants, however, originated from tropical forests. They have thus adapted to the light conditions in the shade of dense tree populations. UV light and light in the blue range is filtered by natural means here. Hence, it is important to use only the right kind of aquarium lights for your water plants. Good lightings will result in healthy growing plants which will be a reward to all freshwater planted aquarists.
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