I would simply not feed in the winter as it appears it is doing the algae more good than the fish. The statement I made earlier about fish feeding until the food is gone does not apply to cold water. The most humane way to kill a fish is to put it in water and put it in the freezer. Its metabolism slows down gradually until it stops.
Many aquarium hobbyists use automatic feeders.
Most if not all aquarium hobbyists goal is for their fish to thrive not simply survive.
I think that what we are finding out that the only difference is the scale. A LMB today is the same as it was almost 6k years ago.
