Does this plant look like it has cal mag def? The other plant in the same system looks great, it's just this one.
Didn't you just finish using the wrong nutrient mix for stage of plant growth? How bout letting them settle in a little before fucking with them again.
i agree, let them go for a bit and then see if the new growth looks better. also even though you were using the wrong mix at first you said your tap water was like 380 and your end mix was 8 somthin, thats 500 ppm for very small plants. I would go the first week at like 300, so your end ppm should be your tap water plus 300. also most likely LATER if they still look like they have mag deficiancy then you would probly want to use epsom salt not calmag, hard water usually has plenty of calcium and epsom salt is only mag.