I purchased the Northern Brewery honey brown ale extract kit and cooked it up on the 19th. It started real soon with airlock activity and got a head of about 2 inches on it. Well today the 23 I have no airlock activity and no head.... My first gravity reading was 1.051 and today I took a sample and got 1.010.? Should it happen this fast? Also I tasted the sample and it tastes watered down? Is that normal...? The yeast I used was Wyeast #1056 American Ale Yeast. I kept it at temps around 70 deg. HElP... Thanks for all you help in advance