The biological filter will benefit from a bacterial inoculation to get it jump-started in spring. The bacteria in MICROBE-LIFT also do many targeted chores in the pond and aquarium, some of which are in areas that do not traverse the filter, such as bogs or the bottom of ponds with no bottom drain. The answer to this would be that you cannot have too much “good guy” bacteria in the pond/ aquarium. Any excess of the beneficial bacteria will simply die off when the food supply is gone. We recommend the maintenance dosages to assure the optimum numbers and distribution of bacteria for the best results under the changing conditions in your pond or aquarium.