Introduction of selection and incubation of vermiculite

　　Kinds of vermiculite individual hypertrophy requirements to each of the 12 grams or more as well. Request activity is stronger, surface smooth, bright color without scar, the density of livestock for 20 to 25 kg per acre (2000-2000).

　　Leech (leeches) in 11 ℃ above can breed, hatched by 16-25 young &co. Spawning period near the pond to keep quiet. So as not to disturb spawning oil leech (leeches), empty egg cocoon.

　　孵化期避免在平台上走动，以兔踩破卵茧。孵出的幼蛭3天后可自行采食河蚌、螺蛳的血液。

　　Incubation period to avoid walking on the platform, to step on rabbit eggs cocoon. Hatched larvae vermiculite in 3 days can feed themselves mussels, blood of snails.

　　So to put enough feed, generally for every one thousand leech (leeches) on 20 kilograms of snails, mussels, once every week feeding livestock blood clots, feed for their freedom. But should pay attention to clean blood slag and other remaining food at any time, in order to keep the water clean.