... : 1) Crystal soil is a new type of green environmental material . 2) It's non-toxic, odorles ... Features:1) Crystal soil is a new type of green environmental material2) It's non-toxic, odorless and clear3 ... available: red, pink, blue, yellow, purple, orange, green, light green, light blue, transparent6) Three shapes available: cubic shape, ... easily occoures germs or discolor crystal gel water soil