Cut PVC (polyvinyl chloride) pipe and glue caps to the cut edges.
Make holes in planters to put PVC pipes on them.
Make holls on PVC pipes at shorter interval in comparison with the test type.
Wrap the PVC pipes with thermal insulator.
Drill holes on aretion pipes and put sponge tubes on them.
Cut plastic cardboards and form auter cases.
Place styrofoam block at the bottom of the outer case to make space for an air pomp and other electrical devices.
Put the pipes on the planter and place the reflaction covers. Type-2 completed!