Changed out the nutes again tonight. Before refilling the reservoir I flushed each plant and the tank with straight distilled water. PPM is at 590 and the pH is at 5.3. Yes, pH is a bit low, but I'm going to wait until at least tomorrow morning before I mess with it to give the nutes time to settle in.
I've also gotten the bucket, pump, and tubing to start the second reservoir. Unfortunately I did *not* buy enough water to fill it lol. So I'll be setting that up tomorrow. My original plan to use the monitor/drain line won't work because of the pump design so both intake and outflow will have to feed from the top of the main hydro unit...which is actually probably easier anyway.
The plants are definately showing some nute damage
. Leaves are curling and I somehow lost one entire fan leaf on the biggest plant. Curled up like it'd been put in a dehydrator. I'm guessing it was the salts from the baking soda. Hopefully all my babies will recover.