Gingerbeer--thick layer of something floating on the surface

[apollonia]

Hi there!
Thanks for this forum! I'm making gingerbeer with the recipe from Wild Fermentation and I have a couple questions.

My gingerbeer is in bail top bottles and has been fermenting for a week. You can see a bit of cloudy sediment in the bottles, plus there are layers of sediment floating on the surface. Its a yellowish/tannish color and about an inch thick - thinner and whispier near the bottom.

1. Is this normal and will the gingerbeer be okay to drink after it ferments another week? Should I try to skim it out?

2. I'm also curious what folks recommend for the appropriate amount of headspace to use when bottling.

thank you!