Are you planning a system like Texas Greenhouse equipment? Then it is driven by water pressure, not pump. They make auto-timer controlled solinoids system and valve that turns the water line open and closed. Better than a pump in my estimation.
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Ross
http://orchids-ross.blogspot.com/
I don't do most Dendros or large, "floofy orchids". For me it's minis (like Angraecoides), Masdies, Paphs, and others that crept in somewhere along the line. See my orchid list for complete collection (usually not current.)
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