The utility model discloses a corophium,
algae-eating worm and
algae microorganism culture device, which belongs to the technical field of
microorganism culture and is characterized in that the bottom of an upper culture pond is communicated with a lower
water storage pond, and a water pump is communicated between the upper culture pond and the lower
water storage pond; the upper culture pond and the lower
water storage pond can be arranged in an indoor and outdoor artificial pond body and can also be arranged in a
surface water body; the external auxiliary mechanism comprises a connecting floating
assembly, the connecting floating
assembly is connected to the exterior of the top of the culture pond in a sleeving mode, the top of the culture pond is connected with a protective cover
assembly, the protective cover assembly comprises a sunshine cover, and the sunshine cover is installed at the top of the upper culture pond; a sunshine cover in the protective cover assembly can effectively prevent outside sundries from entering the culture pond, interference on
microorganism culture is avoided, the heat preservation effect can be achieved, natural light can be fully utilized, the
photosynthesis requirement of
algae microorganisms is met, and growth and
reproduction of the algae microorganisms are promoted.