About the JBL Pro Pond Winter JBL Pro Pond Winter is a fast-sinking, complete food for pond fish. Its protein/fat ratio of 2:1 makes it the ideal food for the winter season. Pro Pond Winter takes into account temperature, function and size of the animal. Thanks to wheat, salmon, fish oil, shrimps and corn, your koi will stay healthy. The quality of the sinking feed beads is maintained in the...