I used a white labs WLP051 Yeast in this 5 gallon session ipa I'm brewing. I did a yeast started and when I pitched the yeast it started producing co2 pretty quickly. Within 10 hours it was bubbling pretty quickly. Now 3 days into fermentation, I'm getting close to no bubbles in the air lock. Should I agitate the fermenter? I also have yeast nutrients. Could I use any of that?