SPRING & FALL DIET 4-L / 1.72-LB SPRING & FALL DIET 4-L 1.72-LB $13.25 SKU: TET16481 QTY: Click here to save 5% off of your order! TETRA SPRING/FALL DIET (AQUA LABEL) 4-L / 1.72-LB WheatGerm?s exceptional digestibility at low temperatures is very important since fish metabolism and the pond?s ammonia-reducing biological activity are greatly diminished in colder months. Feed in spring and fall, when water temperatures are below 50?F and above 39?F.