Article: How Much & How Often to Feed Koi (Water Temperature Chart)
How Much & How Often to Feed Koi (Water Temperature Chart)
The most common mistake in koi keeping is feeding the same way all year. Koi are ectotherms — their metabolism and digestion track water temperature, not the calendar. Get a pond thermometer, read the water, and feed to these ranges.
The koi feeding temperature chart
| Water temp | What's happening | How to feed |
|---|---|---|
| Below 50°F | Metabolism near zero; digestion stalls | Stop feeding |
| 50–59°F | Cool spring/fall; low activity | Wheat germ, 1–2× per week |
| 59–68°F | Warming up; appetite returns | Staple food, once daily |
| 68–77°F | Peak digestion & growth | Growth/color, 2–4× daily |
| Above 77°F | Very active; oxygen drops | Easy-digest, small & frequent |
How much per feeding?
- The 5-minute rule: offer only what your koi finish in about five minutes, then skim the rest.
- 1–2% of body weight per day in warm water, split across small feedings.
Koi have no true stomach — they digest continuously. Several small meals digest more completely than one big one: better growth, less waste.
When to stop in winter
As water nears the low 50s°F, switch to a wheat-germ formula a few times a week. Below about 50°F, stop entirely — uneaten food fouls the water and koi can't digest it. In autumn, taper from high-protein foods to wheat germ before you cease feeding.
Summer cautions
Above 77°F koi are hungry but warm water holds less oxygen. Feed small, frequent, easily digested meals, run aeration, and feed in the cooler morning hours.
Learn about growth and color feeding.
