I just converted a keg to a keggle and and got a propane burner for brewing outdoors. I put three gallons of water in the keg and timed how long it would take to boil so I could figure out times for brew day.
Once the water had cooled and i poured it out, I noticed these dots along the bottom of the keg.
Does any body know what this is?
the keg is a 13.2 gallon stainless steel keg that had its top cut off with an angle grinder. the stove is a bayou classic sq14 with a bg12 burner.