Cal mag help

Sure. I suspect that most cal mag supplements are pretty similar.

My tap water is almost mineral-free, so I need to supplement. I use General Hydroponics CALiMAGic at 2.5 ml per gallon in my hydroponic reservoir. (When I cut back to 1.25 ml/gallon it wasn't enough.)

If the dosage isn't on the bottle, it should be at the manufacturer's website.

That said, I think Ca/Mg deficiency, though common, is often misdiagnosed. If you would care to post some good photos of your plants, and of the affected leaves in particular, along with answering the questions in "How to Ask for Grow Support", maybe we could help to give a more certain diagnosis and treatment?
 
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