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Any suggestions for a good source of information about hydroponics, including using mist to fertilize and water the plants.

I wrote a book on trichome dense cannabis. In there I explain the proper way to set up a deep water culture system and maintain it throughout flower. You won't find that information elsewhere on the net very easily.
Here's the Preview on Steemit

As for misting, I would only recommend that during veg for cannabis. I don't recommend spraying anything on cannabis during flower formation.

Does that help at all?