regarding pH, can you get indicator drops? those dont break! and theyre always accurate. no calibration required. these are Autos from what ive read? with Autos youre just along for the ride! and i think they are on track for 2 weeks. maybe a bit smal but they have the leaf! 3 or 4 nodes.
I see you said you are using CFLs. How close are you keeping them? What wattage are you using? I would position my 100w CFLs at 2" to 3" at the most when I started with them. Even the big 300 watters from home chepo can get pretty up close and personal.They are far enough along to be that close imo.just keep good air flow across em. Remember they will start to flower between 15 and 25 days of veg. They look good so far just a little bit behind. GL