I brewed a Basic German wheat beer using WLP300, as I noticed the Krausen like no other I have seen before I decided to Harvest about 3-400 ML of what appears to be pure yeast. I filled a quart jar with pure creamy Krausen from my Fermoster. I added sterile water and put in fridge for 24 hours...

It doesn’t seem worth the time. I feel like buying new yeast may be expensive but more convenient.