just wondering , for like 6 months i us to heat up 300L of water in my car port with heaters to change the tank water ive now got sik of walking from the other side of the house with a buck of water! so now i stick the hose in and fill her up. this is all well and good in sommer now coz the water drops like a degree or 2 in the tank wen full of cold water but what do i do in winter?