Beneficial bacteria for aquaponics. nelson and pade, inc. offers nutrient supplements for aquaponics. these include chelated iron, bio thrive, calcium/magnesium, organic supplements and beneficial bacteria for aquaponics. occasionally, an aquaponic system can benefit from the addition of certain nutrients and organisms.. This product remains highly stable and readily available over a very broad ph range (ph 4.0-10.0) for plant uptake. this product is not harmful to fish,.... Potassium has an important role regulating water and nutrient movement in plant cells. potassium is ‘swapped’ for other nutrients when cells exchange ions. it is also required to activate more than 50 plant enzymes which allow critical chemical reactions to happen in the plant. potassium hydroxide added to aquaponics..