Yes but does not mean your take is cycled correct?
It may be advertised that way, but you need to understand what it is/does.
Without explaining the entire nitrogen cycle here..the point of this stuff is you are adding the types of bacteria that consume the bacteria that make up the first 2 parts (of the 3 parts) of the cycle.
The bacteria in this bottle is what makes up the 'nitrates', and they consume the nitrites - which consumed the ammonia.
If you never get to the point of having any ammonia or nitrates, then what is the point in adding bottles with large numbers of nitrates?
Have you tested the water? What are your parameters for ammonia, nitrites & nitrates?
There is also NO need to cycle a tank using live fish - as that is cruel to the fish. Many people put a fresh (raw) supermarket cocktail shrimp into a media bag (in the event it falls apart) and let it sit in there and rot for a few days to create the ammonia, along with a small live rock to introduce the other bacterias you will need (like a starter culture)
Once the ammonia level rises, the nitrites will consume the ammonia.
Then the nitrates consume the nitrites.
THEN your cycle is complete and you haven't killed/harmed any fish.
(you added only the last step in that bio-spira bottle..so not your tank is not cycled)
Skipping the proper steps in this hobby tends to lead to dead fish and people leaving the hobby due to trying to rush things. It's been said here hundreds of time, but I will repeat it..NOTHING good happens fsast in this hobby
