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Gold Label Ultra MG
Prevent & treat magnesium deficiencies with Gold Label Ultra Mg!
It's a magnesium/ sulfuric chelates, which are absorbed quickly across a wide pH.
Use it on inert growing medias (no nutritional content) - like coco, peat, clay pebbles, cellmax, perlite.
If the leaf yellows between veins, but the vein itself is green, you've got an Mg deficiency - grab a bottle of this.
Shake well before use.
Never combine with other nutrients in concentrated form - always add each part one to water separately, mixing in between.