Sniperhank
Giant Clam Addict
If there isn't any splashing or anything in the water it should be ok, but if you want to be cautious that is fine as well. You may want to find a way to get more co2 exchange into the tank to help stabilize your pH. Even as simple as some airline tubing from a pump. A common way to help stabilize pH in winter is putting the airline from a protein skimmer out a window.