Aquarium Systems Water conditioner One & Only

Nitrifying live bacteria 500ml

100% useful bacteria for your freshwater aquarium.

One & Only allows the introduction of 30% of your planned population in just 24 hours. One & Only is very effective after a water change or a treatment. One & Only is made up solely of marine nitrifying bacteria chosen for their ability to create an optimal biological filter in your aquarium. There is no need to store it in a refrigerator and there is no risk of overdose.

Instructions for use:

• Shake well before use.
• 30ml per 100 litres of aquarium water.
• For a new aquarium: use First Defense 30 minutes before introducing 30ml of One & Only per 100 litres of water.
• Use by: 1 year even after opening.