CALiMAGic question

So I think my tds meter is off does anyone know about how much calmag adds per gallon or 5 or 10 using 5ml per gallon

Little high I would think. Recommend is 1ml per ltr no? I go light on extra calmag. Unless im sure they need it. Most base nutes are good enough. Once in a while a genetics needs that extra. Less is usually more my man.