"Repeating Decimal" wrote in message
...
I have a small greenhouse devoted to tomatoes of various kinds. I have six
Dutch pots on each side for a total of twelve. I am having trouble with
mildew or fungus on the leaves.

It might help to know where you are, but it sounds like a humidity problem.

Why not just leave some windows/panels/the door open instead of running a
fan?

Your high-tech hydroponics+fan system seems over-engineered for the plant
care you need.

--
Brian
"Stuck down a hole, in the fog, in the middle of the night, with an owl."