1,rainbow crystal soil 2, new artificial crystal soil 3,flower crystal soil 4,soil moisture meter enlarge big CE new crystal soil,hydro culture soil, rainbow clay1) Ag nano crystal soil is a new type of green environmental material instead of real soil and included of nutrtion. . 2) It's non-toxic, odorless, and clear3) It can absorb water up to 50-150 times of its original weight, and after ...