Arka Bacto-Shot is your go-to solution for quick and effective biological filtration. Packed with millions of live, nitrifying bacteria, it breaks down organic waste and stabilizes the nitrogen cycle - ideal for new setups, water changes, or after filter cleaning.Arka Bacto-Shot+ ready to use - simply dose directly into the aquarium+ rapid reduction of ammonium, nitrite, and nitrate+ long-term support for biological filtration+ suitable for both freshwater and saltwater aquariums+ ready for immediate use - no mixing required+ content suffiient for up to 150 l aquariumwater