I am very new to AG and I am still doing extract. I read all the extract and beginner threads but I only skimmed this partial mash and AG and didnt see an answer or thread like this. I want to get a mash tun cooler. But do i really need 2? I did some reading and it says that its to just sprinkle hot water in. Cant i just close the spigot and dump some hot water in and stir then cap and open spigot again?