AKsteel
To fish or not to fish? What a stupid question :)
Your girls are looking fine. As far as ph goes, I use a different method. I use an "accurate 8" soil probe to check my soil ph before feeding and then adjust my nutrient ph accordingly. For example, I like my promix ph to swing from 6.5 dry soil, to 6.0 wet soil. So if my dry soil before watering is 7.0, I then adjust my feed solution to 5.5 which then gives me a wet soil ph of around 6.0. If my dry soil ph is low then I feed with a higher ph feed solution. I have not ever paid attention to run off ph. This is just my method and it works for me. From what I can see, you are doing well, so don't panic and just listen to your plants. They will tell you what they need, it just takes a little time and experience to learn to speak "plant", but you will catch on quick. Keep up the good work my friend and I will be following along 
Henchy- How exactly are you testing pH in the soil and run-off? I mean procedurally,, not what equipment... Duggy is right, the run-off method is at best, when done right, an estimate,... done wrong, and it's rubbish readings all day long! As a method, it's fraught with potential sources of measurement error... many just test the run-off alone, using buffered water, or worse, nute' solution 
, collecting it out of a dirty saucer
hsoil:<- this long probe unit is the A8, about $60... Those readings you got are no good, if it was in the 4's, there'd be other, worse symptoms... but likely, the soil is acidic... we need to determine if it's far off enough to start a lockout of some nutrients.....***.... big picture, it may be that particular seedling just isn't the best, part of the deal when using seeds... but many a runt has turned the corner and grows out just fine... 
