Corals need the right light conditions and a continuous flow of water in order to thrive. — ULLI GERLACH/FLH/dpa
Colourful and fascinating corals are beautiful additions to a saltwater aquarium. But in order for them to maintain their colour for a long time, they have to be provided with the right light or they may starve to death.
Corals are in fact not plants, but animals. They live in symbiosis with algae that live in them. By photosynthesis, the algae produce sugar compounds and amino acids – nutrients that sustain the corals.
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