It's too late for me to edit this, but I wish I would have put this very simple info in the post when I was writing it.
For anyone wondering a ghetto way to measure out your milliliters without an eye-dropper or syringe...
1/4 teaspoon is about 1.25 milliliters.
1 tablespoon is 5 milliliters.
If you want to add 3ml, just add three not-quite-full 1/4 teaspoons of nutrients.
I am assuming most people have access to a cheap ass set of measuring spoons. If not, go to the dollar store. Or do what I do and buy 5 of those cheap plastic eyedroppers every time you go to the hydro store. I get them for like a dime a piece, or even free sometimes. Which brings me to my next point...
Get to know your shop and your shop owner. I can't emphasize how important that can be. Not only can you land some good discounts and free samples, but if there is something they don't have in stock you want, they might special order it for you. There are so many good reasons to have a good relationship with your store owner, I shouldn't have to name them all.
And if at all possible, shop local. Not only can you use cash, which means no paper trail... but you are supporting a local business. If possible, ALWAYS support your local businesses. And I don't mean Wal-Mart. Even if you are paying an extra $1 per jug of Botanicare, it's worth it. Eventually you will start getting a discount (even if it's just no tax, 10%, etc), and you are keeping a business alive.
I can't tell you how many emergency runs I have had to make to my local grow shop. I will happily pay a fraction more, just to make sure my local shop is available to me. If you need some emergency neem oil or BT spray and Home Depot doesn't have any... you really don't have 4 days to wait for shipping from Amazon.
Long story short, shop local. You will be happy you did.