sera guide - Marine aquariums

If corals, shrimps and other invertebrates are to be kept in the same aquarium, the variety of suitable fish is reduced. Many fish are predators that eat smaller fish, shrimps or coral tentacles. However, even peaceful fish may cause problems: Seahorses, for example, have to be fed very often which may cause water pollution. Also, they eat very slowly, resulting in other fish eating their food. Furthermore, they require calm water conditions and there- fore cannot be kept in coral reef aquariums with strong currents. 1.1 Live rock Live rock means reef rock chunks which are transported moist and at an appropriate temperature along with their entire plant and animal organisms growing on them. Many useful small organisms will get into your aquarium this way and support a natural environment. 1.2 Which animals are suitable? before introduction after having attached corals 55