I know my tds pen is broke but I can usually figure out the right amount by using ph solution and working out the difference and adding it on, anway its just shown as 1500! I don't think that's right considering I ran it at this all last grow.. time will tell.
@Chucky324, i was going to experiment with this run and see how she reacts to different kinds of stress but ive just got some 9lb hammer seeds so I'm thinking of running that now and putting these on the back-burner