Brewed 2 batches 3 weekends ago. Used the same strand of yeast for each (WLP001) with identical starters(1L). OGs were 1.060 and 1.052, I aerated with pure O2 and pitched both starters @ high krausen. Fermentation took off with 24 hours for both batches. Go to check my FG today expecting to bottle this weekend and my readings were 1.022 and 1.018. Damn! This is only 50 something % for each. My ferm temp is a constant 68 degrees and I am wondering why my attenuation is so terrible, especially with this strand of yeast which is supposedly "highly attenuating?"