The last time I used nottingham, i did rehydrate it though, I only got about 1/2" layer of krausen. Could be just that style for that yeast. All have different results. Sounds like it's going fine.
Primary: Starry Night Vanilla Cranberry Porter
Bottled: All Hallow's Eve Pumpkin Ale
Kegs: All Hallow's Eve Pumpkin Ale, Maple Vanilla Brown Ale
Future: Raining Hops and Dogs IPA, Holiday Porter
2013 Previous: Sunrise Honey Rye Pale Ale, Yooper's Oatmeal Stout, Dark Skies Black IPA, Sunset Orange Kolsch
Dark Skies Black IPA - 2nd Place at a local comp. Score of 39 from a BJCP judge
GT Keezer Build