I've been mostly just using cal mag, but Epsom salts are dirt cheap. I dump 1-4 tsp/gallon. I started it on these girls cuz it looks like Mg Def already. These leds drain Mg like crazy.
It's just magnesium sulfate, so it's good for sulfur and magnesium.
It's just magnesium sulfate, so it's good for sulfur and magnesium.