By using a filter from an established tank.
Hello a...What's the fastest way to cycle a tank?
Here is how you cycle it faster: Plan ahead!What's the fastest way to cycle a tank?
I disagree with this. You need the have roughly the same sized BIOLOAD in the tank that has the filter media you're moving over, no matter what size the 2 tanks actually are - and the size and brand of the filter have nothing to do with it. A 100g tank with a bioload of 5 guppies will not have a large enough bacteria colony to support a 50g tank loaded with 30 guppies. The bacteria in any tank will grow to fit to the bioload in the tank (i.e. it's food source) no matter how large the tank and/or filter is.Hello a...
You can cycle a tank instantly if you remove the filter media from a similar tank and place it in the new tank. Specifically, you have to have nearly the same sized tank, within a gallon or two and the filtration has to be the same size and brand. The situation doesn't happen often, but it can be done.