@GizaWRZ, I do not think those spots are anything to do with nutrients. You can take a look at my DIY grow or some of my earlier ones. Basically the roots go into a big amount of clay ball substrate, then into a shallow pool, then into the reservoir. It's a small change from a standard DWC but it makes a big difference.
Out of interest bro and decent grow btw.. buddy and pk can be used together? I see on the bottle it advises not to? Just hitting pk week with my grow and think I'm at the right time to do it.. any suggestions?