Well its May 11th and I live in northwest NJ. We got off to a cool spring start but now the weather on average everyday is between 60-70 degrees and some days in the 80's. When the water reached 50 degrees about a month ago I began feeding them the Blackwater Cold Water food. I am wondering when I should stop the cool water food and begin with the summer food? Advice will be very much appreciated. Thanks in advance