You have to use Grade B - thats what I was told. I got mine at Whole Foods and they have it at EarthFare. Any health, organic grocery store. I'm new at this too. I'm on day 7 though.

Good luck

Because it is important to use only grade B maple syrup as it contains a higher content of nutrients (basically grade B has been boiled down a lot longer than grade A so it's much more condensed).
I don't know if there's a reasonably priced way to purchase it online, but that should be easy enough to find out.
Once you find it I've found it so much easier for me to mix up a whole days batch -minus the cayenne in the morning (8oz lemon, 8oz maple syrup, and enough distilled (or filtered) water to fill my container up to the 80 oz mark) then I just take the cayenne, a cup marked at 10 oz and my Master-Cleanse along with me to work. Add the cayenne just before you drink the lemonade as the longer it sits the hotter it gets.

Good luck and keep coming back if you have more questions!