I can't tell for sure, is your bubble spray popping directly onto your peat pellets? If so this seems like it would make a big soupy mess. The bubble spray should be landing on open stems and roots, but maybe I'm not understanding something.

Looks like it should work fine though. Don't see why not as long as you change the water daily or so. May I suggest figureing out one big dome instead of individual ones. Makes changing the air much easier (don't forget to do this as often as possible, at least twice each day).

Just in case you missed this one, here's mine, about half way down:
http://boards.cannabis.com/indoor-gr...g-machine.html