I mix according to wets calculator
I dose like so - everyday
40 gal - 20 ml
75 gal - 40 ml
55 gal - 30 ml
26 gal - 15 ml
BBA is nasty - best way I found was to apply with a syringe when doing a water changes. So when 50 % of the water is out I dose the usual amount plus another 10 ML directly to the BBA once all filters power heads etc are off & the tank has zero current. I try to bathe the area in a cloud of glut for at least 10 minutes. The next day its pink
I have one particular set up that has more BBA than I like but I am sure it has to do with circulation - which is one of the reasons i am going to re scape that tank.