Foam cutting collar$

[4maggio]

I've used these over the years, used to be under a dollar, but now

6 feet - $3 <cheaper than manufactured collars

The holes in my 3 gallon bubble cloner are 7/8".. cut this foam pipe cover to about 1.5" giving you
about 40 clone plugs. Open, where it already has a slit, and roll the cutting in. Squish it into the hole.
$3 = 40+ collars.. For larger cloner holes, Id guess pool noodles slit with a box cutter would work too. depends on your op.

 

[Creeperpark]

I've used these over the years, used to be under a dollar, but now

6 feet - $3 <cheaper than manufactured collars

The holes in my 3 gallon bubble cloner are 7/8".. cut this foam pipe cover to about 1.5" giving you
about 40 clone plugs. Open, where it already has a slit, and roll the cutting in. Squish it into the hole.
$3 = 40+ collars.. For larger cloner holes, Id guess pool noodles slit with a box cutter would work too. depends on your op.

Those look good friend. What kind of water are you using?

 

[4maggio]

Local tap water at ~230PPMs.. any water should do...
The idea is to keep the end of the cut from drying it out,
not feeding it. and NEXT DAY air..

AAH! The water in the cloner? That is too, tap at ~230PPMs.. w bubblers, 24/7. Under 1, t5, 2 foot warm bulb

 

[4maggio]

The hardest part is keeping the bubbler rods on the bottom but still removeable..
Been using this 'exact' bubbler for almost 20 years.. success is about 85%..
and probably only need one air pump (Walmart).