When and How to Feed Your Fish in Cooler
Now that temperatures are cooling off in most parts of the
country, now might be a good time to start feeding a wheat germ
based diet to your fish, and feeding less often.
Most 'Spring/Autumn' fish foods are primarily wheat germ based,
and easier for your fish to digest. As water temperatures cool,
there are less natrually occurring digestive enzymes inside your
fish, so it's harder for them to digest their food.
Goldfish and KOI do not have stomachs, just an intestinal tract
that they use to absorb nutrients from their food. However, if
they eat too much, or are fed a high protein diet in cooler
months - they can get backed up - and even become sick.
As a general rule, fish should not be fed at all in temperatures
below 50º F, and only fed a wheat germ or low protein diet when
the water temperature falls below 60 º F.
A Koi's metabolism functions best at temperatures above 70º F,
when they should be fed a high protein diet, as much as 3-4
times per day. However, these high protein foods are difficult
for them to digest when the water falls below 65º F.
Hikari makes a great high quality Wheat Germ diet, which you can
read more about here: