I haven't done any brewing or cider making in probably 8 years (!) and decided to make a cider with my sister- and brother-in-law. I've definitely taken some shortcuts to simplify the process -- decided against doing a secondary. However, my SIL really wanted to try adding rhubarb so we made a simple syrup and basically turned the rhubarb into a sauce and added it to the primary (after 2 weeks of initial fermentation). The sugars from the rhubarb sauce kicked off yeast production, as I anticipated. However, instead of creating a bigger yeast cake layer, it produced a lot of funky looking stuff that's now floating at the top. We sanitized everything with Star San so I didn't anticipate an infection. It doesn't smell bad -- still smells like cider. Is it OK? What's happening here? Thanks in advance!