Omega One Wheat Germ - Spring/Fall Fish Food. It is important to stop feeding cold water fish when the temperature of the water goes below 50 degrees F. However, you should use a special blend of fish food that is highly palatable and digestive formula that can be feed to fish in lower temperatures. Made with wheat germ, fresh ocean kelp, and spirulina. Formula provides the proper nutrients and fiber to help keep the fish healthy as their digestive system slows. Feed temperatures 55-40 degrees F.