Because cycling is the process of growing large populations of 2 different types of bacteria, one that uses ammonia, and one that uses nitrite. It takes time.
These beneficial bacteria are not free floating plank-tonic, but sessile, meaning they are a biofilm that needs a surface/substrate to attach to.
The larger the tank, the larger the populations must be.
3 weeks is hardly enough time to grow the billions of bacteria needed, 2 months is more realistic.
These beneficial bacteria are not free floating plank-tonic, but sessile, meaning they are a biofilm that needs a surface/substrate to attach to.
The larger the tank, the larger the populations must be.
3 weeks is hardly enough time to grow the billions of bacteria needed, 2 months is more realistic.