Originally Posted by ASpeedyGTO
Hello and thank you for reading my post. I want to try a partial mash brew, and my question revolves around using a cooler as a mash tun. Once strike water and grains are inside and doing their thing, am I supposed to leave it completely be until finished, or should I open the lid periodically to agitate the grains (like I did when merely steeping specialty grains when extract brewing)?
My guess is to leave it alone until ready to sparge so that I don't risk losing the mash temperature..... Can somebody please confirm or correct me?
Well, since your doing a partial the amount of warm water your going to be using is going to be small. The cooler/tun is going to lose heat. I recommend preheating the tun with hot water. Then, when you mash, check it every 15 minutes having some boiling water handy to raise the temp when it drops.
I have found that 4 cups of boiling water usually raises my mash 2 to 3 degrees.
Hope this helps.