sup with this little girl?

Hey y'all. I have an ebb and flow system and this plant is the first one to get hit with water from the res. I changed the water today and upped the ppm a bit and within a couple of hours I could see some root burn, so I drained it and filled it with water and flushed for about an hour and a half. All of the plants that were starting to look bad perked up. This one, however looks pretty bad. I'd like to keep the rest of the girls from looking like this. Any ideas?

What kind of strain is this? Looks like it doesn't like much nutes. Whats the ph? Are you using ro water?

It's Critical Mass Auto, PH is 5.5 and I'm using tap water. Thanks for your help

They looked good, till I messed with em
https://www.rollitup.org/grow-journals/554550-25-big-buddha-critical-mass.html

I assume it's root burn but don't know for sure. the reason I added nutes is because they weren't as lush green as they were just yesterday

its nute burn...shouldn't feed them when there still seedlings.

Problem solved, thanks!

like this post when/if they get better or worse and if that wasn't the problem I will try to help.

I'm going to cut the light back from 19 hours to 16 hours as well. They may be getting too much light