Thought id post here since this forum is practically a brewing water thread. So I made an ipa using 1 oz of 13% AA Nelson saucing hops for bittering. Theoretically my recipe was supposed to come out at 70ish IBUs but I barely detect bitterness at all, the aroma and flavor are there but not bitter. I put a tablespoon of gypsum into the water (I don't know the numbers on it) So, is there anything else that could be to blame aside from water profile to kill the bitterness?