Made a 1L starter for a 10gal batch of black ipa. Split the wort into 5gal buckets. "Eyeballed" 50% of starter into each bucket. 24hrs later one bucket bubbling away, other bucket nothing. Pop the lid a see what's going on? Give it a gentle stir? Move to warmer area? Any ideas/suggestions/opinions welcome. Yeast was from an American Ale II and a packet of US-05