Manufacturer recommends 5ml / 50g H20. That's 1ml / 10g. That's .1 / 1g. So that's .6 ml / 6g. You can dose 2x recommended dosage so that's 1.2ml / 6g. You can dose that daily.
You dose 15ml /week. 1.2 x 7 = 8.4 ml / week for a 2x dosage. On your dose days, you are dosing 4x overdose. You are also dosing twice as much as you probably should throughout the course of each week. 3x-4x is what people dose if they are trying to kill BBA and even then they only do it for maybe a week and then stop and they have to watch their plants and animals for signs of stress.
I dose 6 drops daily in my 2.5g because I assume there is 2g of actual water, so that would put my dosage for 2x at .4 ml. Each of my drops is .06ml so I am dosing .36 instead of .40
"Insanity: doing [or asking] the same thing over and over again and expecting different results."