Fine gravel 2-3mm size is excellent as bottom gravel to prevent soil flowing into the bottom of the terrarium pot after watering. Hence, dry sphagnum moss sometimes it is not necessary to be in between the charcoal and soil.
Fine gravel also can be used as decoration or part of the colorful theme at the bottom wall of the pot or on top of the soil to create a beach theme. The paintings are water proof and safe for plant.
Extra small : approx. 40ml, package size 7cm x 6cm
Medium : approx. 300ml, package size 14cm x 9cm
Large : approx. 1000ml, package size 20.5cm x 13cm