Finally a use for hardtack

https://preview.redd.it/1u98ldtky5kg1.png?width=2158&format=png&auto=webp&s=dd3753d9037bb83281b17eff79e2f800a94d79e2

Piping hardtack into the ocean dump near your fishing docks can replenish fish stock. Now the question is, how high can the stock go?