Feed your pond fish the nutrition they need in the spring and fall with Tetra Pond Spring & Fall Diet Transitional Fish Food. In spring and fall when temperatures are lower, fish metabolism and other biological activities slow down so they need a highly digestible food to keep them healthy. Tetra Pond Spring & Fall Diet Transitional Fish Food contains wheat germ to transition fish in and out of winter. It is extremely digestible, even in cold water temperatures, and creates less waste leaving water cleaner longer.