Not sure what to do?

So i might have a problem but i'm not really sure yet let me start from the begining lol

First i over nuted my babies which led to some nute burn and i corrected the problem and it's been 2 weeks now they are looking alot better but i've noticed some of the leaves have yellowish brown markings on the tip. My nutes are good and they seem to be drinking about 5 cups of h20 per day so at least they r growing. So my temp is at 79-81 degrees and humidity never above 49%. my ph is 5.8 and ppm 520 i've also noticed that some of the roots are turning brownish but they dont smell or anything....

If anyone could help i'd appreciate it.
Thanks View attachment 2410200View attachment 2410201View attachment 2410202View attachment 2410203View attachment 2410204

I would say 520 is too much for them. Looks like nute burn. I had to do the same, I started at 800, went to 500, and had to go to 300 before I saw a big improvement. I run the same water farm kit as well. Once you get the PPM lowered, the leaves will look the same, but the new growth will be significantly better looking. Also, if your new growth has black tips, that's a big indicator too of nute burn. Less is more sometimes.

also, i run my drip system 15 mins on, 15 mins off.

cut ur ppm in half and use some h202 (29% or higher) until roots start growing white again, then use pondzyme. keep ur water temp below 68 F,

Sweet guys ty i do my water farm 15 on and 15 off as well

if the roots are already in the water no need to top feed.

Just a couple are in the water.and how much h2o2 should i use?