Hi Jack'- That's Ca and a little Mg defc. all the way,...looks like your pH is fine, so lockout is a non-issue,... The random scattered brown spots are Ca defc. symptoms, and the pale areas on the leaf between veins looks like early Mg defc.; there's a good reason why these two are paired together in so many supplements! ..wish I knew the scientific reason behind why, but.... :dunno: Some plants can be serious Ca-Mg hogs, when others right next to them are fine... see it all the time here! So, Magical has a good conc. of stuff, but if it's not keeping up with the demand, and you don't want to mess with the res' soln. for the other plants, I recommend a foliar spray; it's the fastest way into the plant, hands down, and it takes the roots/medium out of the equation; now, to maximize the effectiveness, you should use a water spreader/wetting agent in the foliar soln.; this stuff takes the surface tension out of the soln., so it coats more evenly instead of just beading up... and the way nute's get absorbed by leaves, simply put, the more surface area covered= more absorbed! As I have no experience with Hydro, I don't know if upping the Magi-cal conc. in the res' beyond what's recommended is going to mess with the rest of the balance in there,... likely not, and you can try it, but at this stage, foliar is the way to go! Water spreaders are readily available, and most are not expensive,... If you want to try this, let us know, and we'll talk you through it- :thumbs: respond at the LTH thread plz, so we see it sooner!
