So I started a second stage for my starter tonight. 1L of WLP530.
First stage went off without a hitch on Saturday. Sat on a stir plate for 24 hours, then went into the fridge until tonight (Thursday). Took it out, decanted, and added another liter of wort. Within an hour, there was kraussen up to the foam stopper, and a rotten egg smell… Neither of these two things happened during the first stage. Is this something to be concerned with?