First time Hydro problem

Hi everyone.
I have a couple of 2 week old plants, my first time in hydro. I had some algea problems because of light leak but I think I was able to sort it out. I cleaned the roots, sterilized everything and added some drops of chlorine.

Growth is still stunted but roots seem to be white and growing.

I noticed some yellowing though, is that Nitrogen deficiency?

I use tapwater with an EC of .5, after adding chlorine it was .53 and I added nutrients to be at 0.6

any help?
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