I inspected a cake and found that it barely was able to hold itself together. Placing this in a loose weave bag, I anticipate that it will dissolve and settle out within a hour or two. The cake appeared to be made with small feed grains, meal, and bound by molasses. In my opinion, it will take a significant number of these cakes placed in the water for several days to stimulate the food chain to show any conclusive proof. I have known people to hang sacks of soured wheat in burlap bags over brush to stimulate the food chain and thereby attracting the zooplankton which attracts the minnows. Within a few days, they were able to catch various species of fish off the bag. Periodically, they replenished the feed and sustained the fishery.