Brewing Morebeer Morehaze recipe kit, airlock starting going crazy after 4 hours but has stopped after the second day. Did a double pitch of Giga Yeast Vermont IPA. Initial gravity was 1.071 when expected was 1.086-90 according to the recipe. After about 48 hours airlock activity has stopped and did a first dry hop addition, getting a gravity reading of 1.028 which if fermentation is done would be a lot lower abv than i had hoped for. The krausen is not visible but there is some residue along the side wall of the fermentor and a thick 3 inch layer of sediment on the bottom. I am wondering if there is a possible issue with the yeast and if I should throw in some dry yeast i have, I also have yeast nutrients that i forgot to put in during the boil. Any ideas of what I should do or just wait and let it continue to ferment. Thanks!