Any new pics? And how's the PE doing? I'm on day 17 from seed w/ her at the moment, and after about day 7 she exploded and has been growing nicely after I dialed a few things in. Thanks for the hypothetical PPM/water situation you gave above, helped clear up a little bit of the haziness I had left on the subject. Very informative, as always.
The PE is in the back up waterfarm, under 4 6500k t8 flouros 38w. She is looking OK. She kinda developed a little crook in her stem, just like Babylicious did when I put her in the waterfarm. I'll have to get a pic and show ya'll. It is only 8 days old, so it is root building. PH is a 6.4, but seed is in a peat pot, so that should even out.
The clones are doing great root wise on three of the cuttings. Two that I suspect were taken up higher on the plant are resisting rooting, while some have roots over an inch long!. The leaves are showing that they are about ready to be introduced to nutrients. I've begun foliar feeding. Water in fog bucket is at 300 ppm.
I've been thinking long and hard about it and I've decided what I'm going to do. The problem is, what to do with rooted clones in 2" net pots with bottoms cut out? I needed to be able to transition them for vegetation. I'm kind of limited on available wattage on my circuit and my nursery closet is hurting for space. I've decided to go with an ebb & Flow system from Hydro Farm called the Microgarden....
It is made from AB Plastic that is 1/4" thick. The top tray is 7" high and has an adjustable height on the flood level. This version has (

5" pots for soiless medium. The bottom of the tray has raised grooves to keep pots out of draining water. The 10 gallon reservoir has a lid and a slide off port cover to gain access to the reservoir for testing or adding water and nutrient. The Drain bulkhead is reinforced for strength and recessed to prevent accidents.
The dimensions are 14"w x 31"L x 18"h
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And for light, HO T5 fixture with German reflective with 95% reflectivity and providing nearly 10,000 lumen for only 96 watts. I'll be using mixed spectrums, 6500k and 3000k. This light would be 5 stars IF it had dual on/off switches on alternate sockets, so you could turn off bulb 1 and 3 or 2 and 4 if you wished to reduce lumen or select a specific spectrum to turn on/off.
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I look at the cost as being an investment in not purchasing seeds in the future. This system should allow me to veg clones for just 2-3 weeks before they'll be ready for flowering in the tent.