Bottled bacteria is a good way of speeding up a cycle for a new aquarium (please see cycling section) using these products can shorten a cycle down from upwards of 6 weeks to as little as 3-7 days. If using a bottled bacteria to cycle a fresh aquarium, please note although your aquarium is cycled and ready for wet pets, it is still a very immature system, so slowly adding fish is still the best option.