Whitelabs London Ale Yeast Wlp013

[Pumpy]

I have been using this yeast and despite using a good size starter and aerating it well with a diffuser stone ,It original gravity was 1.055 and 46 litres has been fermenting for seven days at 20C sometimes 18C and still only 1.030 .

Should I use the diffuser stone to aerate it again ?

Any ideas

Pumpy

 

[NRB]

I would say no... if you aerate now you're sure to oxidise it.

 

[Pumpy]

Do you reckon it will oxidise ?

In the Palmer book it says for a stuck fermentation swirl the yeast to get it back into suspension ,I supose that is not aerating it

Pumpy

 

[NRB]

Swirling is fine as you've got a blanket of CO2 above the wort and filling the fermenter. If you bubble air through it you'll guarantee oxidation as you're at least half way through fermentation.

 

[Pumpy]

because it was a double batch I made a starte but only the night before maybe it was a weak starter.

Pumpy

 

[Ross]

Pumpy,

Is the gravity still falling, albeit slowly? If so, don't panic...

If it's stopped I'd be giving it a gentle swirl...

Cheers Ross

 

[Pumpy]

OK guys thanks I will try that