OK - no more nutrients for a while. I don't think I mentioned this before, but the plants are growing in a sliding door closet. I don't really have room for a large bowl of water, but I did go out and get a small humidifier - it doesn't seem to be working as well as I would like. I'm also having problems with temperature. I now have a fan blowing on the fan - I tried using it as an exhaust, but it didn't seem to pulling the hot air off like I would like it to, so I changed it to pulling from outside (I'm in Arizona - right now the temps are in the 80's at its hottest. I also have a cold air vent ducted to a fan that is blowing on the plants too. All this and I've gone from 86 to 81 degrees, is this acceptable? Humidity is reading at 27% - I think because there is so much air movement in such a tiny space that it is blowing all of the moisture in the air out.

I have noticed small white spots on the top of a leaf of my stronger plant, what is that?

I'm leaving for a few hours and I'm going to leave the system unattended and see what happens. Thanks for the input!