i assume you are growing hydro.. see this thread. some places you need the stuff even if you aren't using RO water (Colorado front range)
http://boards.cannabis.com/hydroponi...lmag-plus.html
copobo Reviewed by copobo on . Leaf dissease, nute defficiency, or what? Hi there everyone... I got these strange brown dots on the leaves on one of my plants. The leaves are bright green, almost yellowish. The bottom leaves have these dots smaller and rusty colored. here are some photos: http://i257.photobucket.com/albums/hh208/leftism111/canna022.jpg http://i257.photobucket.com/albums/hh208/leftism111/canna021.jpg Do anybody out there know whats the problem? thx Rating: 5