Water temperature below 55oF
Feed only one time per day, during the warmest part of the day. Set the automatic feeder for one second. If fish are not feeding, discontinue feeding until water the temperature increases above 55-60oF.

Thsi from our website, full info here http://lakework.com/site/fish-feeding-programs.php
watch the fish they will tell you when to turn it down or off completely.

Greg Grimes
www.lakework.com