2 1/8" hole saw
1 3/4" hole saw
1/4" drill bit
Rubbermaid bucket with lid (24" x 16" x 8.75" in pic)
Hard foam garden knee pad (PlantSmart at walmart)
Heavy duty foam tape weatherstripping (1/8" thick and wide enough to fill the inside slot on the lid)
Big air pump (60g in pic)
Silicone air tube
First you want to draw some holes on the lid for the clones to go, use the base of the 1 3/4" saw bit for a template.
Then drill them out with the 1 3/4" saw bit.
Then switch over to the 2 1/8" saw bit, important to use this type of bit and cut out some inserts.
Then clean them up a bit and cut a slit down the middle to the center hole. Then clean out the center holes with the 1/4" bit.
Now comes the hard part, tape the whole bucket and lid with tin tape, you want it light proof.
Then line the inside edge of the lid with the 1/8" thick foam weather stripping, this will keep the bubbling water in the bucket. You don't want anything thicker then 1/8" or the lid won't go on properly.
Next drill 2 - 1/4" holes on the back at the very top from the inside of the bucket for the air hose. Also glue the air stones to the bottom and the tubes in place, a glue gun works great for this. If you're going to have more clones then me then you might want to add some extra air stones and have them staggered.
Here's a look at the back.
And there you have it, a decent little bubble cloner. You might also want to add another 1 3/4" hole at the very front corner for checking PH and adding more water.
I'm sure you noticed the water level indicator, that's not really necessary and can cause problems later and may not even work. Right now I have it filled over the indicator which I expected but it may also be lower then it when I veg. I wanted it there for vegging, guess time will tell if it was worth it. If you want it like that its just 1/2" plastic pipe fittings from home depot. I have a rubber washer on each side and used heavy duty silicon all around for extra support, these containers are quite flimsy.