As long as its fermenting and finishes up close to where it should then I wouldn't worry about it.
Sometimes I don't get much krausen, sometimes its rushing out the blowoff tube. Like I said, no biggie as long as the yeast do their job.
EAC - 5/2/14
Growing Hops in Key West, FL....
Primary : Mosaic Cream ale
Primary : Muddy Waters Bourbon Mocha Stout
Primary : London System Southern English Brown
On Tap : Pumpkin Pie Cider, Cash Rules Everything Around Me CREAM Ale, Edicion Regionales Inglaterra
*Member: The HBT Sweaty Fat Guys Cigar club