If anyone was/is interested, the reason they were growing so slowly was not only a high PH, but I believe that because they are in an inert growing medium they need nutrients basically right off the bat.
I have fed the seedlings in the picture water the very first time, then about 5 days after a very weak, probably 1/4th recommended dose of sensi grow and they are looking really good (apart from one mutant looking thing.. cant even see where the next leaves are going to appear, really strange)
So from now on, I will feed them in the 2nd watering, rather than going 4 or 5 feedings (2 weeks nearly) without any nutrients, it was too long and combined with the high PH the plant had access to very little and what it did it was struggling with anyway, just a horrible scenario.
Its nice when the ppm of the nutes gets higher because I find it takes a good amount for the "PH perfect" tech to work, but saying that, it DOES work well when you are near full strength nutes and I never need to check ppm.
Thanks to anyone reading..