Springtime is the most critical time of the year for fish in the pond. As water temperatures rise it puts our fish in the danger zone also referred to as Aeromonas Alley. The danger zone is water temperatures between 50° and 65°. In many states during the winter the water temperature drops below 50° which kills all the bacteria (good and bad) and most parasites become inactive. Fish do not eat at these temperatures and the pond goes into a period of dormancy. Here in Georgia, however, spring's warmer daytime temperatures starts raising the water temperature but we still have cool nights.