We have been asked alot about winter feeding, hope this helps. First you will need to calculate the total weight of fish in your pond. An alternative to actually weighing your fish is to use the graph below. It shows typical average weights of koi at various lengths. For optimum benefit feed the amount of food suggested below, which is a percentage of the total weight of your fish in relation to pond temperature. Feed twice daily (morning & evening).

E.g. if you have a pond containing 10kg of fish with a water temperature of 17°C, the total amount of food fed each day is 1% of 10kg = 100g. This 100g should be fed 50g in the morning and 50g in the evening. 

Suggested:

Water Temp     5°C-12°C   13°C-15°C    16°C-20°C     21°C-25°C

Daily feed (g)     0.25%            0.5%             1.0%               1-1.5%