Cycle

[gcourtney13]

I am setting up a new 125 gallon tank. I am gonna use the filter media from my existing 15 gallon and 32 gallon tank. What should my cycle look like. Both tanks have been running for almost 2 years.

 

[Mr. Mojo Rising]

Filter media meaning like sponges or bio balls? That will help speed up the cycle, but I would still test to make sure.

 

[gcourtney13]

I plan on using the sponges and the filter balls. As well as the rocks from the other 2 tanks.

 

[Fish Fan]

If using mature media and rocks, you'll likely have a very small or no cycle. You can "test" the system by adding enough ammonium chloride to raise the ammonia to about 2.0 ppm, then check again in 24 hours, and if the ammonia is <0.25 ppm, you should be safe to start adding livestock.