As well as koi and goldfish many pond owners keep further “native” fish species in their pond. These Central European or North American fish species are referred to as biotope fish. The most common species are: sunbleaks, gudgeons, orfes & ides, three-spined sticklebacks, European bitterlings, common minnow species and others.
Most biotope fish are small animal eaters. Some species also eat herbal elements.
Since goldfish and koi have a different food spectrum and also often a different size, biotope fish which are mostly significantly smaller need to be fed with a special biotope fish food, such as JBL ProPond Biotope.
During the feeding goldfish and koi will certainly also eat JBL ProPond Biotope. But this shouldn’t be a problem because they like and tolerate the ingredients of this food, too.