All right, so am I! You should try to get your air circulating better then to prevent uneven patches of high CO2 or high heat in the room. Cool on the tea; it's probably got some good organic buffers/chelators that are helping keep micros available. And you sprayed a micro supp? That's the main reason your leaves are going to green up.

I was talking to my hydro shop guru the other day and if you want to go bed style, he'd recommend a deeper bed, full of an inert material or stabilized soilless mix, with SUPER EXTRA perlite. Personally, I'd run it as a top feeding drip-to-waste. Once long ago and far away on a site called Marihemp, was this dude who grew in beds made of kiddie pools full of hydroton... very cool!