The good news is that it holds water?.the bad news is that it only flowed out of one exhaust port?.or the other, but not both. There was a bit of a circulation loop going on. It needed to draw air from one side to supply the other.

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So I cracked the yellow lid on the manifold some and the flow evened out to a good flow on both sides simultaneously. So I diddled a bit venting the lid (it took more vent than I thought)

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So with a good flow to the grow chambers I proceeded to cover the first three netpots and watch for fog flow at the last opening. The flow was somewhat weaker?but most likely good enough.

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Finally I covered the fourth and final opening (no picture) and the fog flow stopped entirely. So it??s going to need a vent at the far end to keep a flow going. Or no neoprene collars or?or?
As far as fog flow?.that??s as far as I got with that today.

I did find this site today with very small fans, adapters, and speed controllers. Coolerguys.com carries a huge variety of computer case fans. We have case fans in all different sizes and colors, from 40mm to 360mm, black to multi- color. Shop at Coolerguys.com for the best selection and price! All Case Fans are Guaranteed! so if I must use a fan?.then so be it!

I did fiddle with pump flow not overrunning the ½? drain. At 20? with an 80gph pump seemed a nice balance. I ran it for about a half hour into a little more than a half gallon of water in the reservoir with no appreciable heat gain.

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Again?.the mechanical issues I will overcome. The issues of fogging/ splashing (the reason for posting) only take the back seat momentarily. I just need a little more time to read and come up with reasonable questions.

Thanks all,
Horsemanrocks.