Critical time, need feedback on yes/no on nutes

[scottcc5s]

I have the same system with 18 buckets running atm and final number will be 21.

You getting up to 21 buckets....VERY nice.

Some of my seedlings are not looking to good last couple of days and I am heading out of town for July 4th weekend. I was thinking about hitting them with 1/4 strength nutes within the next day or so, I am worried they might be dead when I get back if I do not give little nutes. They will be 3 weeks old this Friday.

Based on these pics would you add 1/4 strength nutes or let them go?? I am going to put them in the buckets on Monday (5th).