All in one overnight mash

[Harbey]

Had a lovely day yesterday brewing 20+L of hoppy pale. But it did take quite a big chunk of the day so I'm thinking that I might try an overnight mash. I have a Grainfather but I imagine it's the same for all the all-in-one systems. Does anyone do this and, if so, do you keep it at temperature using the heating element (and if so, is it just the usual mash temp)? And do you leave the recirculation/pump going (I think I'd be a little nervous of finding 17L of sugary water on the floor in the morning). Any thoughts or shared experiences welcomed.

 

[UKSkydiver]

Some previous discussion here: Overnight Mashing ? | The Homebrew Forum - Homebrewing Forums

I just did one and my efficiency went up loads.

Mash for 30-60 mins as usual, then set the temp to +50'c until the morning to keep lacto at bay.

Wrap up the AIO in a sleeping bag / quilt / cats / dogs

I did not have the recirc pump on, just the smaller heating element