well, maybe I allready read too much
that's why I am worried. Yellowing plants wouldn't bother me, but those spots are alarming. and also the speed they appeared. now I dont know if I should rise the amount of nutes or wait with them for bit longer. Here's couple more detailed pictures.See, this is my second growth and the first one ended up very badly. plants just died. I didn't have a ph metr then and by the time I've got it they were yelow as bananas. Nute lock. But this is diferent.