So, I picked up a nice combo ph / ppm / temp gauge by Hanna; the one with the three lcd screens. It turns out my Ph was around 8.6!

I poured about 1.5 little bottles of the lemon juice, the one that is shaped and colored like a lemon, into my res with about 12 gal in it and it lowered it to around 6.8.

My girlfriend picked up some ph up and ph down from one of the local hydro shops (I have three within 10 mins ) and so the ph was down to 5.5, now it's back up to 5.7.

I also added in about 3ml / gal of some liquid earth vigor and about 1.5-2ml / gal of liquid earth's grow.

My PPms are now at 590 although I have a stinking suspicion my tap water has around 300-400 PPM.

I don't know how old the clones are, if forced to guess I would say around 3 weeks?

So I have filled my res up to 15 gal with a total ppm of 590, ph is 5.7, canopy temperature is at 80 with a humidity of 43%.

I am very worried about S2, the gal in the lower left. Crossing my fingers and singing her to sleep tonight