It all depends on the water temperature…
>30 oC: Fish with higher oxygen demand (e.g. kois >40cm) should be fed no more than 2 times a day. Smaller fish may be fed no more than 4 times a day. Ensure there is good, reliable aeration at all times.
21-30oC: Feed 2-4 times a day (even up to 6 times a day provided that the filtration can handle the loading and that there is sufficient dissolved oxygen).
10-21oC: Feed 1-2 times a day, what can be consumed within 3-5 minutes.
8-10 oC:Feed alternate days, what can be consumed within 3-5 minutes.
4.5-8 oC:Feed every 3rd day, what can be consumed within 3-5 minutes.
<4.5 oC: Cease feeding entirely. This is so that food will not ferment in the gut when the fish are less metabolically active.