Do LED’s promote cal-mag issues

Prawn Connery said:

Why would you use a blend that you know is deficient? That just doesn't make any sense.

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Each plant is diferent in its needs.and its a 3 part nute base with pure magnesium and pure calcium soo you can mix how you want.original recepie(on the box) is for tomatoes

OK, that makes a bit more sense if you've not used it before and don't have a formula. Indicas tend to be more magnesium hogs and prefer a slightly higher pH than sativas, so nutrient requirements can also be strain dependent, but generally a good alround nutrient has most things covered.