This system can be used indoors or outdoors, can be used as a cloner or to grow veggies and plants.
This is the first set I build, 5 years ago.
It is still perfectly working.
Step 1: List of materials
The inside rim is important, as the PVC tubing will rest on it.
1/2 inch PVC tube
4 pieces 1/2 inch PVC tube 90 degrees angles.
one T junction 1/2 inch
an aquarium pump
a 15inch long flexible water hose 1/2 inch diameter.
6 or 8 empty yoghurt pots
a 24 hour timer
Step 2: Pot holes
With a marker, draw the places where they will be, allow some space between the pots.
I made 10 holes, but 6 or 4 are definitely OK.
Make sure all pots get enough "splash".
When you cut the cover, be careful for you fingers.
Cut holes with a cutter or better with a clock saw if you have one.
When using a clock saw, use a very low speed.
I warn you, be careful for you fingers.
Step 3: PVC emitters
With a pencil draw a straight line in the PVC tubes.
Punch holes with nail and hammer or better drill holes of 1 or 2mm.
Clean the debris inside the PVC tubes.