Aqua one biostarter beneficial bacteria 3 sizes. Provides beneficial bacteria to your filtration system reducing the effects of new tank syndrome’ and help to avoid toxic ammonia & nitrite spikes.. Features. Boost your filter. Rapid settlement of good bacteria. 10Ml treats 100l. Directions. New tank: add two capfuls 20ml per 100l of aquarium water once per day for 3 days, then repeat single treatment after 7 days. After cleaning filter: add two to four capfuls 20-40ml per 100l of aquarium water.. Regular treatment: add one capful 10ml per 100l of aquarium water once per week. 50Ml treats 500l . 150Ml treats 1500l . 300Ml treats 3000l . Suitability. Coldwater, tropical & marine