Philipps grow

What is your lamp distance mate?

After examing your diary closer, I don't think an EC of 1 would burn them, unless you have been feeding that for the entire grow and there was an early buildup. A P and K deficiency can lead to slow growth. You should be at around a 1.4 ec right now I would guess. Check the EC of your runoff. If it's lower coming out than going in, you need to feed more. If it's higher coming out than going in, feed less.

You might have a P or K toxicity. The only real issue I see with the pla t is thin and week new growth. That's indicative of too much P and K. You may have too much N as well, although I can't tell how green your leaves are. If they looks dark to you, it's too much N. That being said, doesn't look like you've actually burned her yet. Try feeding her with just pH'd water for 2 or 3 feeds and see how she responds. Even better if you can check the EC of your runoff.