Originally Posted by Jacktar
How do I add more fermentables? How do I know if I need to? I'm making an IPA.
5 1/2 lbs DME
1lb crystal malt
1/2lb pilsner malt.
Looks like the bulk of your fermentables will come from the DME anyway, so you may not have to worry very much. Take a gravity reading before you chill the wort (making sure to adjust for the temperature difference). Compare the reading to the OG your recipe says you'll have. If it's close, you are okay. If you feel it's too low, you could add extra DME, LME, or even a little sugar to add to the fermentables.
The reason I suggest doing this before you chill is because then you should be able to simply add the extra sugar straight to the wort and it will dissolve. If you chill first, you might have to boil the sugar in a little water to dissolve it before adding to the wort. That's okay too though.