Hi. Made my first grain beer and its turned out really good, I'm so pleased with it its gonna be difficult to not get carried away with it all!

It was a basic pale ale with only maris otter and I think because of this it is very thin so lacks head. So I read that carapils helps with head and retention and I plan on using some but added to the same recipe as I'm not confident enough to stray too far from what I know at the moment. I read that when first using speciality malts its best to use it sparingly and err on the side of caution. 10% of the base malt it says. So just a couple of questions to get me on my 2nd grain brew:
When it says 10% of the base malt do i need to deduct 10% of the base malt, to keep the total amount of grain the same, or is the speciality grains added as well?
Also what shade of carapils would be best for adding body to a pale ale? Or is there only one grade/shade (whatever is called) of carapils?
Cheers and happy new year
