Aquarium Systems One&Only Fresh

One & Only consists exclusively of nitrifying bacteria, selected according to their ability to create an optimal biological filter in your aquarium. It is not necessary to store them in the refrigerator and there is no danger of overdose.

Application :

• Shake well before use
• 30 ml per 100 liters of aquarium water
• For a new aquarium: use First Defense 30 minutes before applying 30 ml of One & Only per 100 liters of water
• Shelf life: 1 year, even after opening