Here is teh deal I have to go clean this restuarant soon. The problem I will have is that I have to fill my water tank with water to wash the place. I have washed it several times in the spring and summer. With no problems now the problem I am facing is the restuarant is 15 miles away and the temps have been below freezing the past few days. My question is will my water tank freeze up it is a 350 gal. tank I now it wont freeze up all the way but is this something I should be concernd about? Or will it just be fine the way its? It does take a few hours to clean this place. The run off a pump the runs about 3 or 4 gal per minute. Not enough to keep my washer running but enough to keep the tank some what filled while I clean. If I do this will that be enough to stop the tank from forming ice? since water will be running in the tank at a steady pace. A just don't want to mess up anything. Better safe then sorry. Thanks for any and all help