Yes. The smount of bacteria depends on
1. The constant flow of loads, ammonia. It will adjust to maintain zero ammonia by either dieing or growing.provided (2) is met.
2. The amount of home for bacteria to grow. Home means media such as rocks, sands, filter media, etc
To speed up the grow of bacteria,
1. Seed the new tank with old bacteria in a mature tank.
Eg. Live rocks for lfs, dose bacteria, or get old and dry filter media.
2. Still need to put the source of ammonia regularly. That is why the instruction of the bottles of bacteria call the users to put at a certain days interval.