More advice
I don't remember the brand of water heater I have but it is a common type with a glass lined stainless steel tank. Anyway, I found out, quite by accident, that after removing all of the hoses and draining the tank, there is still about one to one and a half gallons of water inside. There is no separate drain plug. My winterizing routine now includes pumping the extra water out with a small pump attached to my electric drill. I then add pleanty of antifreeze to the tank just to make sure. In the spring, if you flush the water tank separately before reconnecting the hoses, it will take less time to get your fresh water clear of the fuzzy pink stuff.