I haven't used CalMag in years, (I use unsulphered molasses) but once a week per instructions is a good place to start.

Homework builds character and a strong knowledge base. Don't stop researching. :thumbsup:

Blankstairs: This is greenthumbs thread. But if you'd like to start your own thread, I'd feel more comfortable discussing your issues there. Thank you.
Rusty Trichome Reviewed by Rusty Trichome on . Brown Spots & Yellowing of fan leaves @ 4 wks flower. Hello everyone! This is my second closet grow, and after a successful first grow I am stoked to harvest again. I have 6 plants in Fox Farm soil, under a 400w hps, light at 12/12, circulation fan, temp stays between 72-76 degrees, humidity stays around 40%, watered with Nestle Pure H20 (which is supposed to be a pH of 5.5), and they are fed Tiger Bloom, and Big Bloom Fox Farm nutes every other watering (once/wk). All of the plants are big, green and healthy except for one, Wild Purple, which Rating: 5