When to do a Rest???

[jtupper]

So I brewed my first lager last Sunday night. It has been fermenting for 4 days now and has gone from a SG of 1.044 to 1.020 approx 75% done by my calculations(all in primary @ 50F). Am I ready to move this into the house at around 68F until done for a diacetyl rest? or should I wait another day or two?

 

[Hammy71]

You can do it now or wait. I'm not as anal about the percentage thing. I usually just do the rest after 7 days.

 

[jtupper]

Just checked airlock after an hour after taking my gravity reading. Still getting 43 bbls per minute so I'm gonna let it stay at 50 for a few more days. I'll check again sat night. Does this sound ok?

 

[cactusgarrett]

Don't use the airlock. Continue to use grav readings to dictate the steps you want to take. The airlock bubbling is probably just the off-gassing from the warming up.

 

[zgoda]

I follow an advice from my local fellow homebrewers that diacetyl rest should be done after the fermentation is complete. In my case this is after 14-18 days.