Hi, all. I'm in Zone 6b, and this will be my first winter with my stock tank water garden. Things have really gone well, all summer long, and I want to make sure that I transition into cold weather the right way.\n\nMy tank is a galvanized metal stock tank, about 300 gallons. I've got lots of filtration-\-maybe more than necessary, and about 9 fish (comets/shubunkin), unless there are fry that I haven't found yet.\n\nAt this point, I'm just starting to make my shopping list for things that I'll need.\n\n1. Net to keep fall leaves out.\n2. Air stone/oxygenator.\n3. Heating element.\n4. Bales of hay to insulate the tank from\n\nAnything else that I should put on my shopping list?\n\nAlso, if people have recommendations for the size, types or brands of air stones and heaters I should be looking for, I'd be grateful for the advice.