Tomato fermentation foil cover?

Question

I am going to ferment some tomato goo seeds junk in a cup (nice vocabulary ^^) and i was wondering if it is okay to use aluminum foil (with a hole of course) rather than plastic wrap to cover the cup because we are out of plastic. I wasn't sure if the process required light or not/

Answer 1

Why are you fermenting tomatoes?  Curious. If you're not eating them then sure, use it.