To counter the development of mushrooms
FCC (Food Chemical Codex) 6th Edition - E501 Food Grade Product (ii) Potassium bicarbonate is used as an organic fungicide. It acts as a contact fungicide inhibiting mycelium development and increasing pH to control fungi in crops. He considered a safe and nontoxic fungicide for use in the production of organic crops. It increases the pH in aquaponic or bioponic systems.