soil mix is coco, around 20-25 percent perlite, some 4-4-4, and glacial rock dust, worm castings, and a tiny buit of kelp. been watering originally at 5.8 but i figured it could be a magnesium issue, (which is wasn't,) so i am back at 5.8. i unfortunately don't have a ppm pen. i've been told...