WTF IS THIS

It may be a mag deficiency but it could be caused by your runoff ec creeping up. Salts build, you need to water down until your ec lowers some. The mag deficiency is probably caused by lockout not deficiency. Cheers

I guess my friend is correct.They say not to add more than 30% coco to your soil mix when making it.That's what's in mine now.With that much coco you should add some Calcium at least once a week due to coco clinging onto nutrients,the main one being calcium.I'd get Advanced Nutrients Cal-Mag because it has extra iron and amino acids in.They say iron along with calcium is the missing link in non specific coco nutrients.They add amino acids as it increases calcium intake by 1000%.Thie Duutch have recently found this out.Amino Acids will stop powdery mildew and bud rot as well.Most Cal-Mag products only have Cal-mag in them.

This is a magnesium deficiency, my friend, I think I answered this for you before, it starts off as a yellowing of the leaves between the veins. It then slowly starts to climb up the leaves and while it's climbing, some of the first affected leaves will develop rusty-looking spots. But don't get confused. The rusty-looking spots are actually a sign of calcium deficiency. When a plant is deficient in magnesium, it will also become deficient in calcium. Now as far as the BioBizz light mix, either there is something wrong with the soil which means contact BioBizz or your meter needs to be calibrated, if you calibrate the meter and still get the same ready, then the problem is the soil, if not then the problem is the meter.