Spotting on leaves , 1st week of vegetative stage

[AKTG]

Hi Everyone ,

This is my first rdwc grow . I haven’t changed the nutrients in 3 weeks , as they were not feeding at all.
Now that they are feeding , I getting these spots on 1 of my 4 strains.

can anyone tell me what could cause this discoloring on my slurricane ix?

I do plan on changing out the nutrients today.

 

[93OG]

What nutes are you using, ph, last time calibrated meter, ppms? It could just be that they are getting over their previous problems and things will smooth out over the next few days

 

[AKTG]

What nutes are you using, ph, last time calibrated meter, ppms? It could just be that they are getting over their previous problems and things will smooth out over the next few days

vivosoun pH meter was off by a whole point, not even a year old. Aperah PH60 is on point, plants are looking healthy now.