Very fast ferment with Safale S-05?

[SpamNMash]

I've googled this and others have reported similar, but I thought I'd check anyway:

A batch of "Big Kenny" (recipeview.php?recipe_id=35) seems to have finished fermentation very quickly - under 48 hours. The yeast has flocculated and formed a nice cake at the bottom, the krausen has dissipated, etc. etc.

OG was 1.047, gravity measured today was 1.013 - the expected FG for the recipe. This corresponds to an attenuation of about 73%, which from Google again seems to be not abnormal.

The room temp has never been above 24C or below 21C, so I don't have any particular reason to think I've zonked the yeast.

Does this all seem reasonable?

Cheers!

EDIT: Just tasted it and it's definitely a bitter. Needs to condition for sure, but doesn't seem to have any wild yeast involved.

 

[PD]

05 is a very good yeast and works well in my experience.
I think your fermenting temps are a little high and thats whats helped to get a quick ferment.
You want to be fermenting 18-20C for ales

I've also found it a bit of a bugger to fully settle out. Cooling the wort will help

 

[Hawks]

Sounds quite fast for S-05, and normally it does not clear down well either :wha:

The room temp is a touch on the warm side, you probably want to aim for nearer 18c as fermentation is exothermic so your FV will be warmer.

EDIT: Beaten to it by PD

 

[SpamNMash]

Yeah, I'm aware the temp is a bit warmer than optimum - unfortunately I don't have the space for a fridge or other cooler so I'm reliant on ambient temperatures

It definitely needs clearing - I'm planning to leave it on the yeast for a few weeks then cold crash it outside for a bit. Isinglass finings as a last resort.