乐生活The main pump of the cylinder burned on the last night before going out. Change it and take a picture of the occupants on it.
This is Spirorbis, a nomadic annelid that secretes calcareous shells attached to other objects and extends its pinnate gill crown to intercept food in water. In a fish tank, spirochetes may multiply in large quantities, occupying smooth objects such as pumps, forming such a group of killers, but spirochetes do not harm other organisms, and generally do not grow in the main tank, so rowing is probably the greatest disadvantage of their flooding…
