Hey guys I’m not great at math but I think I got it right. I was hoping someone could clarify it for me. If I wanted a 3% solution hitting the roof and I was drawing from a 50gallon tank using 12.5% I would need roughly 19 gallons of SH and 31 gallons of water? I figured that out buy dividing 19/50= 38% so 38% of my 50 gallon tank is SH I then divided 38% by 12.5% = 3.04% hitting the roof. Is my math correct? Is this how you correctly figure out mix ratios?