seriously, lol, i did indeed put that bubbler away in favor of my ice-tube-trays.Seriously, you retired the bubbler for this? 100% success with no effort, no dome, and no cloning solution with the bubbler, I didn't think it got any easier.
the bubbler worked fine for me but demanded much more attention than these trays do and, because this method is totally passive, there are no pumps that can fail on you, and there is MUCH less cleaning involved. ...also, my bubbler only did 18 cuts at a time and i can fit 2 of these ice-tube-trays in the same space so i can do 54 cuts in the space i used to need for 18.
believe me, this method is the simplest way to root clones i've ever seen.
...and for anyone STILL having trouble finding them they are available at REI or you can do a Google search, ...for instance, they are available at Amazon so, if you want them bad enough, you can find them.
...also, while i like the idea of the translucent popsicle trays, i don't see any way to remove your clones other than tugging them out which WILL damage some roots on some clones, that's why i made a little ram-rod to PUSH my clones out.
peace, and stay safe, SOG