Yeah, you would need 64 ml for 16 weeks.Phew. I dont think I did my math right when I ordered the primo I thought 4 x 10ml was plenty for 16 week at 400mg.. ugh
I think you should extend to 20 weeks, so that would mean 80 ml in total (another 4 x 10 ml). You don’t have to but if you’re ordering 2 x 10 ml, might as well buy more since you’d be paying the same shipping. You can still stop at 16 weeks and store the rest for another run. You can never have too much primo on hand.