The lower the temperature, the lower the digestive time. So do patches of fungus, mold, hairworms, and rising nitrates. Lower dissolved oxygen levels and declining pH are also common. This pollution is caused with no benefit to your fish. It is most likely the result of your good intentions.
Different fish require different foods.
Hence, floating foods, slow sinking foods, and rapidly sinking foods should be used. A combination is suggested to ensure proper nutrition. Live food supplements can be used once a week to complete the nutritional needs of your aquatic friends. Like most animals, fish will eat more then they need. Yes, it s fun to watch, but we do not want to feed the tank.