Some DWC burns, what should i do?

Here are some pics of my young-ens and i am curious what some of these discoloration in the leaves are and what shall i do?

I had the same problem
I guess your feeding to much to young like I did
flush some water through and refill your res with fresh water
I left mine too long and they suffered a bit

not enough info to provide you any help

I was useing a fertilizer i got from home depot, but now i am flushing it and adding ionic grow will see what happens.

getting rid of the home depot fert will help them ALOT! i would go just water for a couple days(48 hours) and then give em 400 ppm grow for a week(1/4 strength).I use ionic and start with 400 ppm and bump them up 200 ppm every week till i hit 1400 ppm, then i hit em with grow and bloom 50/50% at 1600 ppm . In between my weekly bump up i top off my res with ro water & 1/4 strength cal mag only. when you get to around 1000 ppm ionic will put my ph. right at 6.2 from 7.4 out of my ro. if you dont use ro water you probably won't need cal-mag. good luck

In the earlier stages, "sometimes less is more."

The discoloration is the plant begging for more nutes. The plant is getting deficient in nutrients. Check the PH first to make sure it is within range for the plant to uptake the nutes. If that is okay, then give them more nutes.

Good Luck!

Ya ended up getting new nutes, and distilled water and a ph tester & ec tester and they are looking much better just started flowering.