>> I guess you've never had an aquarium
Nope! it's funny - I'm not afraid of chemicals because I know I can take effective precautions. I've worked with carcinogens and radioactive isotopes. But the idea of electrons moving through wires underwater seems ... wrong.
Next time I get an urge to clone something, I'll embolden myself and shop for fountain pumps.
Do you think 5 psi and a few GPH is enough, or do the sprayers need 10 psi?
(I re-read the top of the thread, and I guess I should do some research and experimentation. If more than a dozen sprayers are wanted, maybe 60-120 GPH is desirable (1-2GPM). I should get a few "Ez Clone sprayers" and compare their spray pattern with the irrigation sprayers I already have.
Then test whether a gentle mist is as good as an upside-down rainstorm. I liked someone's idea that that being hit with spray strengthens the water roots like a fan on seedlings' stems.