Altbier Kit Yeast Starter

I have a altbier kit from MidWest Sup in the fermenter now (5+ gallons). After reading on here the last few days it seems that I should have used two smack packs when I pitched. What can happen (or not happen) if I used to little? I had a lot of activity for the first few days but it has calmed down to nothing since, it is sitting at around 68 deg ambient temp. Should I add a packet of dry yeast now or just see how it comes out???

Only way to tell is to take a gravity reading.

What's your OG supposed to be at?

If it were me I'd go with a laissez faire approach and just let that bad boy sit for a while and go about your business as usual. If you're really concerned go buy another Wyeast pack and pitch it in.

Just remember that at the end of the day you're trying to control a process that neither you, or me, really have an in-depth understanding of. You can't really control what you don't understand, you can just kind of shove it in the right direction.

let her sit. wait 2 weeks from brew date and take a reading. Doubling the yeast is kind of overkill as you don't really know if anything is wrong.

What yeast did you use?

I used wyeast 1007 a few months back and learned it needs to be 60 F or lower for fermentation.

See below

https://www.homebrewtalk.com/f37/fruity-oktoberfest-wyeast-1007-a-202116/