Separate Inner Design: Hidden inner design can prevent water evaporation and keep good sanitation. Also you can refresh your planter conveniently.Light and Durable: Green Sun Planter body inner are made with heat resisting ABS and high density Anti-UP PPWater Level Indicator: The shaft design allows less compaction of the soil which caused by the pressure put on with top watering.Stopper: With the unique inner design now you can clean up your planter without obstructing your plantProcess to use Hydro SeriesSet up: First make sure the black and red stopper are firmly installed. (Remove red stopper for outdoor usage)Put on Plant: Put a layer of soil on top of the foam stone and plant any type of green you like then carefully cover the root with soil again.Initiation: Once the plant has settled in initiate hydro system by filling water according to the water level indicator.Irrigation: Use top watering for the first 2 weeks depending on the type of plant.Hydro System: After the first 2 weeks the root will grow into the foam stone. You can irrigate the plant by hydro system only. For larger plant it may take longer.Size12 x 12 x 23cm