My last 10 gallons of .060 IPA I used 400ml US05 slurry in one bucket and and two dry packs in the other. Both had 4.75 gallons of wort pitched at 65deg together. They both took off at about the same time. I went away for 4 days and the slurry had no more pressure in the air lock ,but the dry was chugging away. After 7 days the dry is still bubbling. MI pulled the lid on both krausen on dry non on the slurry .004 done. It was probably done a couple days ago. The slurry is six or more generations and I was planning on retiring it but now I'm not sure. Do you think it mutated for the better?