Stock photo of koi pond being treated with fish medication, malachite / formalin

Stock Images / Photos of Koi Carp Ponds (Fish)

Stock image of koi pond being treated with fish medication, malachite / formalin

Royalty Free Images - Filename: pond_medication_pouring_1.jpg

Many people choose to medicate their koi ponds at the beginning of spring and again at the end of autumn, so that any potential parasite problems are prevented when the fish's immune systems are naturally low, due to the colder water temperatures.

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