I brewed a 2.25gal IPA yesterday which ended up with a 1.066 og. I'm fermenting with one Wyeast 1318 slap pack (no starter) with a mfg date of 12/18/17. After about 12-14 hours there's about 1/4 in. layer of foam on top so there's at least something going on. The Wyeast 1318 is recommended for up to 5 gal. of 1.06 og so I'm wondering if I should pitch additional yeast today/tomorrow or just let things go and see how fermentation plays out? Any help would be appreciated!